Narrowsburg
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Narrowsburg clear sky chart from 2005-11-06 to 2024-02-20.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.
Observation TypeMinimum conditions for hour to be usableOut of hours
Clear of CloudsTransparencySeeingSky Brightness
Planetary:50%(no limit)Average(no limit)Nighttime Hours
Deep Sky:70%Average(no limit)5.9Nighttime Hours
CCD Imaging:70%Below AveragePoor(no limit)Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

PlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
Night
30%
23161
17%
80451
9%
23070
40%
23070
17%
53412

By Month

MonthDays of MonthPlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
January1st to 10thNight
15%
753
17%
4365
5%
737
31%
737
8%
2720
January11th to 20thNight
18%
759
15%
4377
5%
740
30%
740
7%
3019
January21st to endNight
14%
831
11%
4563
4%
814
30%
814
7%
3365
February1st to 10thNight
15%
760
15%
2470
4%
760
29%
760
14%
1686
February11th to 20thNight
11%
742
15%
2283
2%
739
27%
739
11%
1589
February21st to endNight
15%
592
21%
1776
8%
592
32%
592
14%
1235
March1st to 10thNight
17%
720
18%
2160
5%
720
33%
720
18%
1409
March11th to 20thNight
20%
720
19%
1999
7%
720
31%
720
18%
1365
March21st to endNight
20%
792
21%
2041
6%
792
31%
792
20%
1407
April1st to 10thNight
18%
720
16%
1800
3%
720
25%
720
17%
1328
April11th to 20thNight
25%
711
17%
1775
5%
711
32%
711
22%
1252
April21st to endNight
26%
720
17%
1800
4%
720
33%
720
22%
1265
May1st to 10thNight
28%
485
16%
1565
9%
485
35%
485
16%
1102
May11th to 20thNight
30%
354
20%
1416
14%
354
43%
354
17%
879
May21st to endNight
46%
388
16%
1551
16%
388
54%
388
20%
918
June1st to 10thNight
43%
360
17%
1440
15%
360
54%
360
20%
864
June11th to 20thNight
45%
360
15%
1440
15%
360
54%
360
22%
847
June21st to endNight
54%
360
15%
1440
15%
360
62%
360
27%
795
July1st to 10thNight
58%
350
15%
1400
19%
350
63%
350
25%
794
July11th to 20thNight
59%
348
17%
1392
21%
348
63%
348
25%
803
July21st to endNight
54%
394
18%
1486
17%
372
59%
372
24%
826
August1st to 10thNight
57%
491
17%
1555
12%
489
61%
489
28%
951
August11th to 20thNight
55%
659
16%
1723
10%
659
58%
659
29%
1150
August21st to endNight
54%
792
19%
1980
9%
792
57%
792
33%
1307
September1st to 10thNight
46%
720
19%
1800
7%
720
51%
720
31%
1202
September11th to 20thNight
51%
720
27%
1832
16%
720
57%
720
37%
1139
September21st to endNight
45%
720
25%
1980
17%
720
52%
720
28%
1294
October1st to 10thNight
37%
720
17%
2150
12%
720
44%
720
22%
1425
October11th to 20thNight
33%
720
18%
2160
11%
720
43%
720
24%
1402
October21st to endNight
25%
792
17%
2482
9%
792
36%
792
17%
1706
November1st to 10thNight
32%
740
22%
2407
11%
740
46%
740
22%
1483
November11th to 20thNight
27%
760
21%
2470
12%
760
39%
760
18%
1590
November21st to endNight
25%
760
18%
2645
8%
760
39%
760
18%
1691
December1st to 10thNight
18%
760
14%
2660
6%
760
29%
760
11%
1882
December11th to 20thNight
19%
760
12%
3237
5%
759
30%
759
9%
2255
December21st to endNight
14%
828
10%
4831
3%
817
29%
817
7%
3467

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

Occurrence of each ForecastData
Points
Cloud CoverDay
17%8%36%6%35%5%6%7%34%
78292
Night
17%8%36%5%345%5%7%36%
80881
TransparencyDay
50%411%22%12%2
77997
Night
48%412%23%12%1
80710
SeeingDay
26%14%27%20%11%4
13829
Night
24%13%26%25%10%1
23183

By Month

Percentage Cloud Cover NE (2006-)
Color Meanings:
Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 10thDay
13%12%6%7%6%35%5%5%6%31%
2517
11th to 20thDay
15%13%7%9%7%345%5%5%25%
2520
21st to endDay
22%14%5%6%6%34445%25%
3064
February1st to 10thDay
17%10%5%7%7%36%5%7%7%26%
1710
11th to 20thDay
14%10%48%5%36%5%5%8%33%
1768
21st to endDay
20%10%47%7%3446%6%29%
1480
March1st to 10thDay
14%8%48%7%445%5%6%35%
1797
11th to 20thDay
17%10%48%7%3445%7%33%
1957
21st to endDay
20%9%36%5%35%45%6%33%
2314
April1st to 10thDay
18%9%46%6%3445%6%35%
2160
11th to 20thDay
18%8%26%5%3345%6%38%
2134
21st to endDay
19%8%36%6%3445%6%35%
2160
May1st to 10thDay
23%8%36%6%35%45%6%32%
2408
11th to 20thDay
20%6%35%5%45%5%6%7%35%
2478
21st to endDay
15%6%25%6%45%5%6%8%38%
2725
June1st to 10thDay
16%6%26%6%45%5%6%10%33%
2520
11th to 20thDay
16%7%36%6%36%6%6%8%32%
2520
21st to endDay
15%6%26%5%45%6%6%9%36%
2520
July1st to 10thDay
11%6%26%6%46%6%8%10%35%
2520
11th to 20thDay
11%425%6%46%6%8%11%39%
2520
21st to endDay
12%5%36%5%46%6%7%9%38%
2744
August1st to 10thDay
12%6%25%6%46%6%9%10%34%
2370
11th to 20thDay
13%6%45%7%47%6%6%8%34%
2158
21st to endDay
15%6%245%45%47%10%38%
2376
September1st to 10thDay
16%6%36%5%35%5%6%7%38%
2160
11th to 20thDay
14%6%245%24448%46%
2126
21st to endDay
18%6%25%6%35%46%8%38%
1980
October1st to 10thDay
20%7%36%4345%5%7%37%
1805
11th to 20thDay
17%7%36%5%35%46%7%37%
1800
21st to endDay
25%8%35%5%346%6%6%29%
1872
November1st to 10thDay
15%9%2442445%7%44%
1671
11th to 20thDay
17%10%36%5%34445%37%
1710
21st to endDay
17%9%36%6%345%5%7%34%
1530
December1st to 10thDay
20%10%5%8%6%345%5%7%27%
1520
11th to 20thDay
22%11%47%434345%32%
1906
21st to endDay
21%15%6%9%6%35%445%21%
2772
January1st to 10thNight
16%9%6%7%5%3445%8%33%
4429
11th to 20thNight
14%10%6%11%8%445%5%6%28%
4440
21st to endNight
24%11%5%8%7%35%45%5%24%
4591
February1st to 10thNight
16%10%46%5%45%5%6%7%32%
2470
11th to 20thNight
13%9%38%6%45%5%6%9%31%
2281
21st to endNight
19%9%37%6%345%6%7%32%
1776
March1st to 10thNight
16%7%37%5%235%7%7%37%
2150
11th to 20thNight
16%8%36%6%35%5%5%7%37%
1998
21st to endNight
17%8%26%6%345%5%7%38%
2041
April1st to 10thNight
18%8%47%6%4446%6%32%
1800
11th to 20thNight
18%7%35%435%448%38%
1775
21st to endNight
20%7%27%5%2345%6%38%
1800
May1st to 10thNight
22%8%37%43445%5%34%
1565
11th to 20thNight
17%6%35%6%245%5%7%39%
1415
21st to endNight
14%5%35%5%35%5%6%8%42%
1550
June1st to 10thNight
18%5%25%6%3446%7%41%
1440
11th to 20thNight
16%6%26%334449%43%
1440
21st to endNight
11%324435%5%8%10%46%
1440
July1st to 10thNight
11%5%35%4345%6%9%45%
1440
11th to 20thNight
12%6%25%4345%7%11%41%
1440
21st to endNight
12%425%5%35%6%5%9%44%
1574
August1st to 10thNight
12%425%6%25%6%6%10%42%
1565
11th to 20thNight
12%6%26%6%45%6%6%9%38%
1723
21st to endNight
15%5%25%4345%6%8%43%
1980
September1st to 10thNight
16%6%245%345%5%7%44%
1800
11th to 20thNight
15%6%24323346%52%
1832
21st to endNight
16%6%25%5%3445%7%43%
1980
October1st to 10thNight
22%5%2443345%6%40%
2150
11th to 20thNight
20%7%34433447%42%
2160
21st to endNight
23%9%3443445%8%34%
2482
November1st to 10thNight
14%6%26%43446%5%44%
2407
11th to 20thNight
19%6%35%5%3346%7%38%
2470
21st to endNight
15%9%35%6%3446%7%37%
2645
December1st to 10thNight
21%10%46%5%445%6%8%28%
2660
11th to 20thNight
20%11%47%5%35%45%7%29%
3288
21st to endNight
24%13%5%7%5%3445%6%25%
4884

Transparency (when cloud cover <= 30%)
Color Meanings:
Too cloudy to forecast Poor Below Average Average Above average Transparent
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 10thDay
53%311%25%7%2
2518
11th to 20thDay
61%310%18%6%2
2520
21st to endDay
62%210%18%7%1
3064
February1st to 10thDay
56%411%18%11%
1710
11th to 20thDay
51%47%23%13%1
1777
21st to endDay
55%210%21%10%2
1480
March1st to 10thDay
50%211%22%11%3
1800
11th to 20thDay
52%310%21%12%2
1957
21st to endDay
52%38%17%16%4
2314
April1st to 10thDay
51%48%22%12%3
2160
11th to 20thDay
47%310%23%14%2
2134
21st to endDay
52%28%21%13%4
2160
May1st to 10thDay
54%38%20%13%2
2408
11th to 20thDay
49%39%22%14%2
2482
21st to endDay
44%5%15%22%13%2
2725
June1st to 10thDay
47%5%13%21%14%
2520
11th to 20thDay
49%411%23%11%1
2520
21st to endDay
44%5%11%28%11%
2520
July1st to 10thDay
44%5%13%22%14%2
2450
11th to 20thDay
38%5%16%27%13%1
2445
21st to endDay
43%414%22%15%2
2591
August1st to 10thDay
43%5%13%26%12%1
2356
11th to 20thDay
46%5%14%25%10%1
2158
21st to endDay
42%411%26%15%2
2376
September1st to 10thDay
45%411%23%14%1
2160
11th to 20thDay
38%39%26%22%2
2126
21st to endDay
45%310%23%17%2
1980
October1st to 10thDay
48%311%22%13%2
1805
11th to 20thDay
46%413%24%13%1
1800
21st to endDay
55%312%19%9%2
1872
November1st to 10thDay
40%313%25%16%2
1671
11th to 20thDay
49%310%21%14%2
1710
21st to endDay
50%315%24%7%1
1530
December1st to 10thDay
58%314%16%8%1
1520
11th to 20thDay
56%314%19%7%1
1906
21st to endDay
68%29%15%6%
2772
January1st to 10thNight
51%213%24%8%2
4429
11th to 20thNight
57%311%20%7%1
4440
21st to endNight
63%28%18%7%1
4591
February1st to 10thNight
50%413%22%9%1
2470
11th to 20thNight
50%5%11%19%13%2
2283
21st to endNight
51%38%23%13%2
1776
March1st to 10thNight
45%314%23%13%2
2160
11th to 20thNight
48%312%23%13%2
1999
21st to endNight
46%310%20%17%3
2041
April1st to 10thNight
53%39%20%12%2
1800
11th to 20thNight
48%310%22%17%1
1775
21st to endNight
47%410%22%14%3
1800
May1st to 10thNight
54%39%19%14%2
1565
11th to 20thNight
46%411%22%15%2
1416
21st to endNight
41%5%16%25%10%2
1551
June1st to 10thNight
43%410%27%16%1
1440
11th to 20thNight
41%418%27%10%1
1440
21st to endNight
33%6%18%28%14%1
1440
July1st to 10thNight
36%6%16%26%14%2
1400
11th to 20thNight
37%6%16%30%11%1
1392
21st to endNight
37%417%23%17%2
1486
August1st to 10thNight
38%5%15%29%12%1
1555
11th to 20thNight
42%417%25%11%
1723
21st to endNight
38%5%12%25%18%1
1980
September1st to 10thNight
39%6%13%27%14%1
1800
11th to 20thNight
35%310%26%24%1
1832
21st to endNight
43%38%24%20%1
1980
October1st to 10thNight
45%411%23%15%1
2150
11th to 20thNight
44%313%26%12%2
2160
21st to endNight
50%411%23%11%1
2482
November1st to 10thNight
41%411%23%19%2
2407
11th to 20thNight
46%311%22%15%2
2470
21st to endNight
46%316%25%10%
2645
December1st to 10thNight
54%5%13%20%8%
2660
11th to 20thNight
55%413%17%10%1
3288
21st to endNight
61%312%18%6%
4884

Seeing (when cloud cover <= 80%)
Color Meanings:
Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 10thDay
33%20%31%12%41
180
11th to 20thDay
44%20%23%11%21
180
21st to endDay
32%22%31%10%32
281
February1st to 10thDay
35%24%31%9%2
270
11th to 20thDay
37%24%30%8%2
382
21st to endDay
36%19%29%14%2
346
March1st to 10thDay
32%20%30%16%3
420
11th to 20thDay
34%22%27%13%41
420
21st to endDay
32%24%27%11%5%3
462
April1st to 10thDay
33%18%27%15%6%1
420
11th to 20thDay
30%18%25%13%10%3
412
21st to endDay
33%15%31%14%5%2
420
May1st to 10thDay
36%14%24%14%9%3
423
11th to 20thDay
24%17%27%21%9%2
447
21st to endDay
21%10%26%23%14%5%
485
June1st to 10thDay
20%11%30%25%10%4
450
11th to 20thDay
22%12%23%24%14%4
450
21st to endDay
18%10%31%25%12%4
450
July1st to 10thDay
14%5%26%30%18%8%
445
11th to 20thDay
14%325%29%23%5%
444
21st to endDay
16%7%32%27%13%5%
488
August1st to 10thDay
14%6%25%26%21%8%
446
11th to 20thDay
18%5%23%26%20%8%
439
21st to endDay
15%7%27%26%15%10%
495
September1st to 10thDay
22%8%22%20%18%10%
450
11th to 20thDay
16%8%24%24%16%12%
450
21st to endDay
21%8%27%23%16%5%
450
October1st to 10thDay
29%7%22%19%17%5%
450
11th to 20thDay
22%15%28%24%10%2
450
21st to endDay
33%14%23%21%8%1
441
November1st to 10thDay
24%13%23%23%14%3
365
11th to 20thDay
31%19%24%19%6%1
370
21st to endDay
33%16%32%13%5%1
190
December1st to 10thDay
32%22%27%12%6%1
180
11th to 20thDay
39%18%28%11%4
180
21st to endDay
30%23%25%16%6%1
198
January1st to 10thNight
27%22%31%18%3
760
11th to 20thNight
31%17%28%21%3
760
21st to endNight
23%22%34%18%3
836
February1st to 10thNight
28%17%33%20%2
760
11th to 20thNight
28%24%31%15%1
742
21st to endNight
31%21%29%15%3
592
March1st to 10thNight
28%18%34%16%3
720
11th to 20thNight
28%20%29%20%4
720
21st to endNight
25%18%32%18%5%1
792
April1st to 10thNight
28%18%30%20%4
720
11th to 20thNight
25%14%31%23%8%
711
21st to endNight
27%15%28%24%7%
720
May1st to 10thNight
31%10%26%24%8%1
485
11th to 20thNight
20%10%32%28%9%1
354
21st to endNight
17%6%21%38%18%
389
June1st to 10thNight
18%6%23%36%16%1
360
11th to 20thNight
18%5%24%35%18%
360
21st to endNight
12%425%42%16%
360
July1st to 10thNight
15%315%40%24%3
350
11th to 20thNight
13%317%45%21%2
348
21st to endNight
14%419%42%21%
394
August1st to 10thNight
13%118%39%26%3
491
11th to 20thNight
16%313%40%26%3
659
21st to endNight
16%416%36%26%2
792
September1st to 10thNight
18%322%32%21%3
720
11th to 20thNight
19%320%31%21%5%
720
21st to endNight
19%6%22%32%18%3
720
October1st to 10thNight
26%8%20%26%17%2
720
11th to 20thNight
26%9%26%29%9%
720
21st to endNight
30%14%27%23%6%
792
November1st to 10thNight
20%14%28%27%11%1
740
11th to 20thNight
27%17%26%23%7%1
760
21st to endNight
22%18%30%23%6%1
760
December1st to 10thNight
30%18%27%19%5%
760
11th to 20thNight
27%20%29%20%4
760
21st to endNight
30%17%32%18%3
836
Page generated at 2024-02-17 06:28:36. Version ac07

Copyright 2024 Attilla Danko


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