Lake Wallenpaupack
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Lake Wallenpaupack clear sky chart from 2005-11-06 to 2024-03-01.

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
25%
23238
17%
80540
7%
23137
37%
23137
16%
52933

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
9%
757
19%
4352
4%
737
28%
737
7%
2628
January11th to 20thNight
13%
760
16%
4370
4%
740
28%
740
7%
2913
January21st to endNight
10%
834
12%
4527
4%
814
29%
814
6%
3259
February1st to 10thNight
10%
760
16%
2470
3%
760
26%
760
12%
1661
February11th to 20thNight
6%
743
16%
2293
2%
740
24%
740
10%
1576
February21st to endNight
12%
628
21%
1884
5%
628
29%
628
12%
1300
March1st to 10thNight
13%
723
19%
2167
4%
723
31%
723
15%
1431
March11th to 20thNight
15%
720
19%
1989
6%
720
29%
720
16%
1353
March21st to endNight
17%
792
20%
2048
5%
792
28%
792
17%
1430
April1st to 10thNight
17%
720
15%
1800
3%
720
24%
720
16%
1319
April11th to 20thNight
21%
711
17%
1775
4%
711
29%
711
22%
1242
April21st to endNight
20%
720
16%
1800
3%
720
28%
720
21%
1280
May1st to 10thNight
24%
496
16%
1576
8%
496
32%
496
15%
1128
May11th to 20thNight
25%
354
20%
1416
10%
354
41%
354
17%
893
May21st to endNight
40%
388
15%
1551
14%
388
48%
388
19%
927
June1st to 10thNight
40%
360
18%
1440
15%
360
51%
360
20%
870
June11th to 20thNight
39%
360
15%
1440
12%
360
50%
360
21%
860
June21st to endNight
46%
360
16%
1440
14%
360
59%
360
28%
782
July1st to 10thNight
51%
350
15%
1400
16%
350
58%
350
24%
829
July11th to 20thNight
51%
348
17%
1392
18%
348
57%
348
23%
814
July21st to endNight
49%
394
18%
1486
16%
372
57%
372
26%
831
August1st to 10thNight
52%
511
17%
1575
10%
509
57%
509
30%
947
August11th to 20thNight
53%
655
15%
1719
8%
655
55%
655
28%
1154
August21st to endNight
49%
792
19%
1980
9%
792
53%
792
32%
1317
September1st to 10thNight
42%
720
19%
1800
7%
720
49%
720
29%
1201
September11th to 20thNight
45%
720
27%
1826
15%
720
52%
720
36%
1141
September21st to endNight
40%
720
25%
1981
16%
720
48%
720
27%
1291
October1st to 10thNight
36%
720
17%
2160
11%
720
44%
720
22%
1417
October11th to 20thNight
29%
720
20%
2160
10%
720
42%
720
24%
1371
October21st to endNight
21%
792
19%
2470
8%
792
35%
792
18%
1637
November1st to 10thNight
26%
740
22%
2407
10%
740
42%
740
21%
1461
November11th to 20thNight
19%
760
23%
2470
8%
760
36%
760
17%
1570
November21st to endNight
19%
760
18%
2650
5%
760
36%
760
16%
1662
December1st to 10thNight
14%
760
16%
2660
4%
760
27%
760
10%
1842
December11th to 20thNight
14%
760
15%
3233
3%
759
28%
759
9%
2171
December21st to endNight
12%
830
10%
4833
4%
817
27%
817
6%
3425

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
15%8%46%6%45%5%5%7%35%
78408
Night
15%8%36%5%35%5%5%7%37%
80997
TransparencyDay
48%5%11%22%12%2
78113
Night
45%6%12%23%13%1
80826
SeeingDay
24%17%30%18%9%3
13879
Night
23%17%30%21%8%1
23250

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%8%5%35%445%34%
2517
11th to 20thDay
12%13%7%10%6%46%45%6%27%
2520
21st to endDay
18%14%6%9%6%3445%6%26%
3094
February1st to 10thDay
16%10%5%7%7%45%5%6%6%31%
1710
11th to 20thDay
12%9%47%7%45%5%6%7%34%
1774
21st to endDay
17%11%46%6%4445%7%31%
1570
March1st to 10thDay
12%9%48%6%45%46%6%35%
1797
11th to 20thDay
14%10%5%7%6%345%6%7%33%
1968
21st to endDay
18%9%47%6%345%5%7%33%
2308
April1st to 10thDay
14%10%46%6%45%45%7%36%
2160
11th to 20thDay
15%9%37%5%335%5%6%38%
2134
21st to endDay
18%7%26%6%345%6%7%35%
2160
May1st to 10thDay
19%8%37%6%445%5%6%32%
2399
11th to 20thDay
18%7%35%7%35%5%5%8%33%
2478
21st to endDay
14%7%36%6%35%46%9%38%
2725
June1st to 10thDay
15%6%36%6%46%6%6%9%34%
2520
11th to 20thDay
14%7%37%7%46%6%5%8%33%
2520
21st to endDay
12%6%36%6%45%5%6%10%37%
2520
July1st to 10thDay
10%6%26%6%5%7%6%7%10%36%
2520
11th to 20thDay
9%5%25%6%46%6%7%10%40%
2520
21st to endDay
11%6%36%6%46%6%7%9%37%
2744
August1st to 10thDay
10%5%36%6%5%6%7%8%10%34%
2350
11th to 20thDay
11%6%37%6%47%7%6%7%36%
2161
21st to endDay
15%5%35%5%45%6%6%9%38%
2376
September1st to 10thDay
16%5%36%6%45%6%5%7%39%
2160
11th to 20thDay
14%5%25%5%3345%8%46%
2134
21st to endDay
16%6%36%5%45%6%5%7%39%
1976
October1st to 10thDay
18%8%36%5%3445%6%39%
1800
11th to 20thDay
14%7%36%6%35%5%6%8%38%
1800
21st to endDay
20%9%35%7%36%5%48%31%
1886
November1st to 10thDay
14%8%35%5%3435%7%45%
1671
11th to 20thDay
15%8%36%5%45%5%5%7%37%
1710
21st to endDay
17%7%46%7%35%5%6%7%34%
1528
December1st to 10thDay
15%11%5%8%6%37%5%6%6%29%
1520
11th to 20thDay
19%10%5%7%6%3345%6%32%
1906
21st to endDay
18%13%7%8%7%45%6%5%5%22%
2772
January1st to 10thNight
14%8%6%6%6%35%5%6%8%34%
4429
11th to 20thNight
13%11%5%9%7%35%6%5%7%30%
4440
21st to endNight
21%11%5%7%7%345%5%6%26%
4560
February1st to 10thNight
15%9%46%5%35%45%7%35%
2470
11th to 20thNight
12%8%47%7%45%6%7%7%32%
2291
21st to endNight
16%9%37%6%3446%6%35%
1884
March1st to 10thNight
15%8%36%5%345%6%7%37%
2157
11th to 20thNight
14%9%46%6%345%5%7%37%
1988
21st to endNight
16%7%35%6%35%5%6%6%38%
2048
April1st to 10thNight
15%8%48%6%46%5%6%7%32%
1800
11th to 20thNight
17%7%25%445%5%6%8%38%
1775
21st to endNight
19%8%35%5%3445%6%38%
1800
May1st to 10thNight
21%10%46%6%35%445%34%
1576
11th to 20thNight
15%7%26%5%35%46%7%39%
1415
21st to endNight
12%5%26%6%35%6%5%10%40%
1550
June1st to 10thNight
17%5%245%35%5%6%8%41%
1440
11th to 20thNight
12%6%26%5%35%5%6%9%41%
1440
21st to endNight
10%4244345%8%9%48%
1440
July1st to 10thNight
10%5%25%5%25%5%6%9%45%
1440
11th to 20thNight
10%6%24435%6%6%11%41%
1440
21st to endNight
10%5%246%35%5%6%8%46%
1574
August1st to 10thNight
10%5%25%44446%12%44%
1585
11th to 20thNight
11%6%36%5%446%7%8%39%
1719
21st to endNight
13%425%5%345%6%8%44%
1980
September1st to 10thNight
14%5%35%5%35%45%7%45%
1800
11th to 20thNight
13%6%23423447%52%
1826
21st to endNight
13%7%25%5%445%5%6%43%
1981
October1st to 10thNight
19%6%25%5%24447%42%
2160
11th to 20thNight
16%7%25%42445%6%43%
2160
21st to endNight
21%8%3443446%7%37%
2470
November1st to 10thNight
12%6%35%6%345%47%46%
2407
11th to 20thNight
17%8%35%43445%7%41%
2470
21st to endNight
14%7%45%5%445%6%8%39%
2650
December1st to 10thNight
18%9%37%6%45%5%5%8%30%
2660
11th to 20thNight
16%10%37%6%45%5%5%7%32%
3288
21st to endNight
21%11%5%8%6%35%446%27%
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
48%6%10%26%7%2
2518
11th to 20thDay
58%49%19%7%2
2520
21st to endDay
58%5%9%19%8%1
3094
February1st to 10thDay
53%5%12%18%11%1
1710
11th to 20thDay
49%5%9%23%13%1
1783
21st to endDay
53%39%22%10%3
1570
March1st to 10thDay
48%312%22%12%3
1800
11th to 20thDay
50%410%23%12%1
1968
21st to endDay
51%48%17%16%3
2308
April1st to 10thDay
48%410%21%13%3
2160
11th to 20thDay
45%5%11%22%14%3
2134
21st to endDay
48%5%8%21%13%4
2160
May1st to 10thDay
53%5%8%20%13%2
2399
11th to 20thDay
49%5%10%20%13%2
2482
21st to endDay
44%6%15%21%13%2
2725
June1st to 10thDay
46%7%12%20%14%1
2520
11th to 20thDay
48%7%12%21%10%2
2520
21st to endDay
42%7%13%27%11%
2520
July1st to 10thDay
43%7%12%23%13%1
2450
11th to 20thDay
38%7%16%25%14%1
2445
21st to endDay
42%7%12%22%15%2
2591
August1st to 10thDay
42%7%14%24%12%
2336
11th to 20thDay
44%7%14%25%10%
2161
21st to endDay
41%6%12%24%15%2
2376
September1st to 10thDay
44%413%22%15%1
2160
11th to 20thDay
38%411%24%22%2
2134
21st to endDay
44%5%10%21%17%2
1976
October1st to 10thDay
47%411%22%13%2
1800
11th to 20thDay
43%412%24%15%1
1800
21st to endDay
52%5%11%19%11%2
1886
November1st to 10thDay
39%412%25%17%3
1671
11th to 20thDay
44%6%9%24%15%2
1710
21st to endDay
47%5%14%24%9%1
1528
December1st to 10thDay
55%5%15%15%10%1
1520
11th to 20thDay
52%5%14%21%7%
1906
21st to endDay
62%6%9%16%6%
2772
January1st to 10thNight
45%5%12%27%9%2
4429
11th to 20thNight
52%7%12%20%8%1
4440
21st to endNight
56%7%8%19%9%1
4560
February1st to 10thNight
47%5%14%22%10%1
2470
11th to 20thNight
48%6%10%20%14%2
2293
21st to endNight
50%49%22%13%3
1884
March1st to 10thNight
44%5%13%23%12%3
2167
11th to 20thNight
45%5%12%23%13%2
1989
21st to endNight
46%5%9%19%17%3
2048
April1st to 10thNight
51%5%11%19%13%2
1800
11th to 20thNight
43%6%11%22%16%1
1775
21st to endNight
46%6%10%21%14%4
1800
May1st to 10thNight
52%6%8%19%12%2
1576
11th to 20thNight
44%6%11%21%16%2
1416
21st to endNight
40%7%16%24%11%2
1551
June1st to 10thNight
41%5%11%26%15%
1440
11th to 20thNight
40%6%17%26%10%1
1440
21st to endNight
31%7%18%30%13%
1440
July1st to 10thNight
36%9%16%25%14%2
1400
11th to 20thNight
35%9%16%28%11%1
1392
21st to endNight
34%7%19%22%16%2
1486
August1st to 10thNight
33%8%17%28%12%1
1575
11th to 20thNight
40%7%17%23%12%
1719
21st to endNight
37%7%13%23%19%1
1980
September1st to 10thNight
39%6%13%27%14%1
1800
11th to 20thNight
34%412%24%23%2
1826
21st to endNight
40%5%9%24%20%1
1981
October1st to 10thNight
44%5%11%24%15%1
2160
11th to 20thNight
40%5%13%27%13%2
2160
21st to endNight
45%5%13%23%13%1
2470
November1st to 10thNight
39%412%22%20%3
2407
11th to 20thNight
43%411%23%16%3
2470
21st to endNight
42%5%16%25%10%1
2650
December1st to 10thNight
51%6%12%22%9%1
2660
11th to 20thNight
49%7%13%19%11%1
3288
21st to endNight
56%7%12%19%7%
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
38%24%27%9%11
180
11th to 20thDay
36%30%26%8%1
180
21st to endDay
30%24%32%9%4
290
February1st to 10thDay
36%26%31%6%1
270
11th to 20thDay
37%27%31%41
382
21st to endDay
36%25%29%8%2
382
March1st to 10thDay
32%22%35%10%1
420
11th to 20thDay
30%26%30%11%31
420
21st to endDay
33%26%27%8%42
462
April1st to 10thDay
32%27%25%11%4
420
11th to 20thDay
27%24%26%14%6%1
412
21st to endDay
30%21%33%10%32
420
May1st to 10thDay
33%16%29%13%6%3
423
11th to 20thDay
23%17%34%18%6%2
447
21st to endDay
20%9%31%23%13%4
485
June1st to 10thDay
22%12%31%24%8%2
450
11th to 20thDay
20%14%26%26%12%2
450
21st to endDay
16%13%34%26%10%2
450
July1st to 10thDay
16%5%31%26%17%6%
445
11th to 20thDay
11%6%30%31%20%2
444
21st to endDay
13%9%35%29%10%3
488
August1st to 10thDay
11%6%31%27%18%7%
446
11th to 20thDay
14%5%28%31%18%5%
439
21st to endDay
14%8%30%27%13%7%
495
September1st to 10thDay
22%10%24%22%15%8%
450
11th to 20thDay
14%9%30%21%16%10%
450
21st to endDay
20%11%32%20%13%4
450
October1st to 10thDay
26%11%25%20%12%6%
450
11th to 20thDay
23%18%30%21%6%2
450
21st to endDay
30%18%29%17%5%1
448
November1st to 10thDay
23%19%26%21%9%2
365
11th to 20thDay
30%25%29%12%41
370
21st to endDay
31%22%34%12%2
188
December1st to 10thDay
31%31%25%8%41
180
11th to 20thDay
39%23%29%6%3
180
21st to endDay
33%23%29%11%4
198
January1st to 10thNight
26%27%34%11%2
760
11th to 20thNight
28%25%31%14%2
760
21st to endNight
22%29%34%14%2
836
February1st to 10thNight
29%24%33%13%1
760
11th to 20thNight
28%30%32%9%1
743
21st to endNight
31%26%29%13%2
628
March1st to 10thNight
31%22%32%12%3
723
11th to 20thNight
29%24%29%15%3
720
21st to endNight
23%27%30%15%5%1
792
April1st to 10thNight
23%24%32%18%3
720
11th to 20thNight
24%19%32%18%6%
711
21st to endNight
26%18%33%19%4
720
May1st to 10thNight
30%13%30%20%7%
496
11th to 20thNight
20%11%38%23%6%1
354
21st to endNight
16%8%29%34%13%1
389
June1st to 10thNight
17%8%28%33%14%
360
11th to 20thNight
15%7%33%34%11%1
360
21st to endNight
11%433%41%9%1
360
July1st to 10thNight
12%426%39%17%2
350
11th to 20thNight
12%326%42%15%1
348
21st to endNight
12%6%25%41%15%1
394
August1st to 10thNight
13%226%37%20%3
511
11th to 20thNight
15%319%39%21%3
655
21st to endNight
16%424%34%21%2
792
September1st to 10thNight
18%7%26%30%18%2
720
11th to 20thNight
15%8%27%26%20%5%
720
21st to endNight
18%8%27%29%15%2
720
October1st to 10thNight
25%13%22%25%14%2
720
11th to 20thNight
22%14%31%27%7%
720
21st to endNight
28%18%30%18%5%
792
November1st to 10thNight
19%21%30%23%7%1
740
11th to 20thNight
27%21%30%16%6%1
760
21st to endNight
23%24%31%16%5%
760
December1st to 10thNight
29%23%31%13%5%
760
11th to 20thNight
27%24%31%15%3
760
21st to endNight
28%25%31%14%3
836
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