Whispering Pines Camping Estates
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Whispering Pines Camping Estates clear sky chart from 2005-11-06 to 2024-01-14.

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 Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(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

By Month

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 Forecast	Data Points
Cloud Cover	Day	17% 7% 3 6% 6% 3 5% 5% 5% 7% 35%	74719
	Night	17% 7% 3 6% 5% 3 5% 5% 5% 7% 37%	75033
Transparency	Day	47% 7% 12% 20% 12% 2	74429
	Night	46% 7% 13% 21% 12% 2	74858
Seeing	Day	24% 15% 28% 20% 11% 3	13684
	Night	21% 12% 28% 27% 10% 1	23113

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
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	13% 11% 6% 7% 7% 4 5% 5% 5% 5% 32%	1517
	11th to 20th	Day	16% 11% 5% 10% 8% 5% 6% 5% 4 7% 24%	1523
	21st to end	Day	13% 11% 5% 10% 8% 3 6% 5% 5% 6% 27%	1782
February	1st to 10th	Day	17% 9% 5% 9% 8% 4 5% 4 5% 6% 26%	1620
	11th to 20th	Day	15% 10% 4 8% 6% 4 5% 5% 5% 7% 31%	1627
	21st to end	Day	21% 10% 3 8% 7% 3 4 4 4 4 31%	1480
March	1st to 10th	Day	13% 10% 4 7% 6% 3 4 5% 5% 6% 36%	1858
	11th to 20th	Day	16% 9% 4 6% 6% 4 5% 4 5% 6% 34%	1980
	21st to end	Day	21% 9% 3 7% 6% 3 4 3 4 5% 35%	2258
April	1st to 10th	Day	17% 9% 3 6% 6% 3 4 4 5% 7% 35%	2160
	11th to 20th	Day	19% 8% 3 4 6% 3 4 4 4 7% 38%	2134
	21st to end	Day	18% 6% 3 5% 5% 4 4 5% 6% 7% 38%	2160
May	1st to 10th	Day	22% 6% 2 5% 6% 4 5% 4 5% 7% 33%	2392
	11th to 20th	Day	21% 6% 3 6% 5% 4 5% 6% 5% 6% 33%	2478
	21st to end	Day	17% 5% 3 4 5% 3 4 5% 7% 8% 39%	2725
June	1st to 10th	Day	15% 6% 3 5% 6% 4 5% 6% 5% 8% 36%	2520
	11th to 20th	Day	17% 6% 3 5% 6% 3 6% 5% 6% 8% 36%	2520
	21st to end	Day	14% 4 2 5% 5% 4 5% 6% 6% 10% 39%	2520
July	1st to 10th	Day	12% 5% 2 5% 6% 3 6% 6% 6% 10% 37%	2520
	11th to 20th	Day	10% 5% 3 5% 4 3 5% 5% 7% 10% 42%	2520
	21st to end	Day	12% 5% 2 6% 6% 4 6% 7% 7% 8% 36%	2672
August	1st to 10th	Day	13% 6% 2 5% 6% 4 6% 6% 7% 8% 36%	2327
	11th to 20th	Day	15% 6% 3 7% 5% 4 6% 6% 6% 8% 35%	2214
	21st to end	Day	17% 6% 2 5% 6% 3 5% 5% 7% 8% 37%	2376
September	1st to 10th	Day	18% 5% 3 4 5% 3 4 4 5% 7% 41%	2160
	11th to 20th	Day	13% 6% 3 5% 4 3 4 4 4 6% 49%	2160
	21st to end	Day	19% 7% 3 6% 4 2 3 5% 6% 6% 39%	1918
October	1st to 10th	Day	20% 6% 2 4 5% 3 4 5% 5% 9% 39%	1800
	11th to 20th	Day	19% 7% 3 5% 5% 3 5% 5% 5% 6% 38%	1800
	21st to end	Day	22% 7% 3 6% 6% 3 5% 5% 5% 6% 34%	1951
November	1st to 10th	Day	15% 8% 3 4 4 3 3 4 5% 5% 45%	1671
	11th to 20th	Day	17% 9% 3 7% 5% 3 4 5% 5% 6% 36%	1658
	21st to end	Day	19% 7% 3 6% 5% 3 4 5% 6% 6% 35%	1520
December	1st to 10th	Day	22% 11% 4 6% 6% 4 6% 4 4 6% 27%	1520
	11th to 20th	Day	23% 10% 4 6% 4 2 4 4 5% 6% 32%	1906
	21st to end	Day	22% 11% 5% 10% 7% 4 6% 5% 5% 4 21%	2772
January	1st to 10th	Night	15% 9% 4 7% 6% 3 5% 4 6% 6% 33%	2649
	11th to 20th	Night	18% 9% 5% 7% 5% 4 5% 6% 5% 7% 29%	2511
	21st to end	Night	12% 10% 5% 7% 7% 4 5% 5% 6% 7% 33%	2574
February	1st to 10th	Night	17% 10% 4 7% 6% 3 5% 5% 5% 6% 32%	2340
	11th to 20th	Night	16% 9% 4 7% 6% 4 5% 6% 5% 6% 33%	2217
	21st to end	Night	19% 9% 3 8% 7% 3 5% 4 5% 6% 31%	1776
March	1st to 10th	Night	16% 7% 4 5% 5% 3 4 5% 6% 6% 38%	2088
	11th to 20th	Night	17% 7% 4 5% 4 3 4 4 5% 7% 40%	1979
	21st to end	Night	17% 9% 3 6% 6% 4 4 4 4 5% 38%	2096
April	1st to 10th	Night	19% 8% 4 6% 6% 4 5% 5% 5% 6% 33%	1800
	11th to 20th	Night	16% 6% 3 5% 5% 3 5% 4 6% 7% 40%	1775
	21st to end	Night	20% 6% 4 5% 4 2 4 4 4 6% 41%	1800
May	1st to 10th	Night	22% 8% 2 5% 4 3 3 4 5% 6% 36%	1581
	11th to 20th	Night	18% 6% 2 4 4 3 6% 6% 6% 6% 40%	1415
	21st to end	Night	15% 5% 2 6% 4 4 5% 5% 5% 7% 42%	1550
June	1st to 10th	Night	15% 5% 3 5% 5% 3 4 5% 5% 8% 43%	1440
	11th to 20th	Night	14% 4 2 6% 5% 4 5% 5% 7% 10% 38%	1440
	21st to end	Night	13% 5% 2 3 4 3 5% 5% 7% 9% 44%	1440
July	1st to 10th	Night	10% 6% 3 5% 5% 3 5% 6% 7% 8% 42%	1440
	11th to 20th	Night	10% 5% 2 5% 5% 3 5% 6% 7% 10% 43%	1440
	21st to end	Night	13% 5% 3 4 5% 3 4 5% 8% 8% 42%	1643
August	1st to 10th	Night	13% 4 2 5% 4 3 5% 6% 7% 10% 40%	1611
	11th to 20th	Night	13% 6% 3 5% 5% 4 6% 5% 7% 8% 38%	1669
	21st to end	Night	15% 5% 3 5% 5% 3 4 4 5% 8% 44%	1980
September	1st to 10th	Night	17% 5% 2 5% 5% 2 5% 4 5% 7% 43%	1800
	11th to 20th	Night	14% 6% 2 4 4 2 4 4 4 7% 51%	1800
	21st to end	Night	17% 5% 3 5% 5% 3 3 4 4 6% 44%	2038
October	1st to 10th	Night	22% 6% 2 4 3 2 4 4 4 5% 43%	2160
	11th to 20th	Night	17% 7% 2 5% 5% 2 4 5% 4 6% 43%	2160
	21st to end	Night	22% 7% 2 5% 4 2 5% 4 5% 6% 36%	2403
November	1st to 10th	Night	12% 6% 3 6% 5% 3 3 4 6% 6% 46%	2407
	11th to 20th	Night	18% 7% 3 5% 5% 3 5% 4 5% 7% 37%	2519
	21st to end	Night	15% 8% 4 6% 5% 3 5% 4 5% 8% 35%	2660
December	1st to 10th	Night	21% 9% 4 8% 5% 3 5% 5% 6% 6% 28%	2660
	11th to 20th	Night	20% 9% 3 7% 6% 4 5% 5% 5% 6% 30%	3288
	21st to end	Night	22% 11% 4 7% 6% 3 5% 4 4 6% 26%	4884

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	53% 5% 13% 19% 8% 1	1518
	11th to 20th	Day	61% 6% 11% 13% 7% 1	1523
	21st to end	Day	57% 6% 11% 17% 9% 1	1782
February	1st to 10th	Day	57% 6% 11% 15% 10% 1	1620
	11th to 20th	Day	53% 6% 9% 22% 8% 1	1636
	21st to end	Day	56% 4 9% 21% 8% 2	1480
March	1st to 10th	Day	49% 6% 11% 22% 10% 2	1861
	11th to 20th	Day	51% 4 10% 21% 12% 2	1980
	21st to end	Day	53% 4 9% 17% 15% 3	2258
April	1st to 10th	Day	50% 5% 9% 20% 12% 3	2160
	11th to 20th	Day	46% 5% 11% 21% 14% 3	2134
	21st to end	Day	45% 5% 11% 21% 14% 4	2160
May	1st to 10th	Day	50% 7% 10% 18% 13% 3	2392
	11th to 20th	Day	49% 8% 10% 18% 12% 2	2482
	21st to end	Day	42% 9% 14% 21% 12% 2	2725
June	1st to 10th	Day	45% 8% 13% 20% 13% 2	2520
	11th to 20th	Day	44% 9% 13% 21% 11% 2	2520
	21st to end	Day	39% 8% 13% 27% 12%	2520
July	1st to 10th	Day	41% 10% 13% 22% 13% 1	2450
	11th to 20th	Day	35% 9% 16% 25% 15% 1	2445
	21st to end	Day	42% 8% 13% 20% 15% 1	2523
August	1st to 10th	Day	43% 10% 13% 21% 13%	2314
	11th to 20th	Day	45% 8% 16% 20% 11% 1	2214
	21st to end	Day	42% 8% 11% 21% 15% 2	2376
September	1st to 10th	Day	43% 7% 12% 21% 15% 2	2160
	11th to 20th	Day	37% 5% 10% 24% 22% 2	2160
	21st to end	Day	45% 6% 10% 19% 18% 2	1918
October	1st to 10th	Day	44% 7% 13% 21% 14% 2	1800
	11th to 20th	Day	46% 6% 11% 25% 12% 1	1800
	21st to end	Day	51% 6% 12% 20% 10% 1	1951
November	1st to 10th	Day	40% 5% 13% 22% 17% 2	1671
	11th to 20th	Day	47% 6% 12% 20% 13% 2	1658
	21st to end	Day	48% 6% 13% 23% 8% 1	1520
December	1st to 10th	Day	59% 6% 12% 15% 7% 1	1520
	11th to 20th	Day	53% 5% 18% 18% 5%	1906
	21st to end	Day	65% 7% 11% 13% 4	2772
January	1st to 10th	Night	50% 7% 13% 19% 10% 2	2649
	11th to 20th	Night	54% 7% 15% 16% 7% 1	2511
	21st to end	Night	49% 6% 12% 20% 11% 1	2574
February	1st to 10th	Night	52% 6% 12% 21% 8% 1	2340
	11th to 20th	Night	52% 6% 11% 17% 11% 2	2219
	21st to end	Night	53% 6% 9% 18% 12% 2	1776
March	1st to 10th	Night	44% 6% 13% 24% 10% 3	2098
	11th to 20th	Night	44% 6% 12% 22% 14% 2	1980
	21st to end	Night	49% 4 10% 17% 17% 3	2096
April	1st to 10th	Night	51% 5% 10% 18% 13% 2	1800
	11th to 20th	Night	42% 7% 12% 20% 17% 1	1775
	21st to end	Night	44% 4 12% 20% 16% 3	1800
May	1st to 10th	Night	48% 7% 10% 21% 11% 3	1581
	11th to 20th	Night	43% 8% 11% 19% 17% 2	1416
	21st to end	Night	40% 10% 14% 19% 14% 3	1551
June	1st to 10th	Night	38% 7% 12% 25% 16% 1	1440
	11th to 20th	Night	40% 8% 15% 23% 12% 2	1440
	21st to end	Night	35% 8% 13% 30% 13% 1	1440
July	1st to 10th	Night	39% 9% 13% 24% 13% 3	1400
	11th to 20th	Night	34% 10% 16% 24% 15% 1	1392
	21st to end	Night	35% 9% 18% 20% 15% 2	1552
August	1st to 10th	Night	37% 10% 15% 24% 14% 1	1600
	11th to 20th	Night	42% 9% 14% 20% 14% 1	1669
	21st to end	Night	39% 7% 12% 22% 19% 2	1980
September	1st to 10th	Night	41% 7% 12% 24% 14% 3	1800
	11th to 20th	Night	34% 6% 11% 27% 20% 2	1800
	21st to end	Night	40% 6% 10% 23% 20% 1	2038
October	1st to 10th	Night	44% 5% 12% 23% 15% 1	2160
	11th to 20th	Night	42% 7% 13% 25% 12% 2	2160
	21st to end	Night	48% 5% 12% 22% 11% 1	2403
November	1st to 10th	Night	38% 5% 14% 23% 18% 2	2407
	11th to 20th	Night	46% 6% 13% 20% 13% 3	2519
	21st to end	Night	46% 7% 14% 22% 10% 1	2660
December	1st to 10th	Night	54% 7% 14% 17% 7%	2660
	11th to 20th	Night	54% 5% 13% 17% 9% 1	3288
	21st to end	Night	58% 7% 14% 17% 4	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
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	32% 19% 33% 13% 2 1	180
	11th to 20th	Day	34% 26% 28% 10% 2	193
	21st to end	Day	25% 30% 30% 11% 5%	264
February	1st to 10th	Day	34% 28% 28% 8% 3	240
	11th to 20th	Day	32% 26% 36% 6%	294
	21st to end	Day	32% 24% 28% 14% 2	346
March	1st to 10th	Day	30% 21% 29% 17% 3	420
	11th to 20th	Day	27% 26% 28% 15% 3 1	420
	21st to end	Day	31% 24% 25% 14% 5% 3	462
April	1st to 10th	Day	30% 20% 29% 14% 6% 1	420
	11th to 20th	Day	30% 21% 24% 14% 9% 2	412
	21st to end	Day	27% 19% 33% 12% 7% 2	420
May	1st to 10th	Day	32% 15% 30% 13% 7% 4	423
	11th to 20th	Day	24% 15% 32% 18% 9% 3	447
	21st to end	Day	22% 10% 26% 20% 16% 6%	485
June	1st to 10th	Day	18% 12% 33% 23% 12% 2	450
	11th to 20th	Day	21% 14% 25% 24% 14% 2	450
	21st to end	Day	15% 11% 32% 27% 14% 1	450
July	1st to 10th	Day	14% 7% 25% 30% 19% 5%	445
	11th to 20th	Day	11% 6% 27% 31% 19% 5%	444
	21st to end	Day	13% 9% 30% 27% 16% 5%	488
August	1st to 10th	Day	15% 8% 22% 27% 21% 7%	446
	11th to 20th	Day	17% 4 25% 29% 17% 9%	439
	21st to end	Day	16% 8% 25% 26% 14% 10%	495
September	1st to 10th	Day	19% 9% 23% 20% 19% 9%	450
	11th to 20th	Day	15% 6% 27% 24% 19% 10%	450
	21st to end	Day	22% 12% 22% 25% 13% 6%	450
October	1st to 10th	Day	24% 11% 21% 23% 16% 5%	450
	11th to 20th	Day	23% 16% 29% 22% 10% 1	450
	21st to end	Day	28% 15% 29% 20% 7% 1	480
November	1st to 10th	Day	24% 14% 27% 22% 11% 1	365
	11th to 20th	Day	26% 20% 30% 18% 5% 1	318
	21st to end	Day	26% 22% 36% 13% 3	180
December	1st to 10th	Day	32% 27% 26% 8% 6% 1	180
	11th to 20th	Day	36% 20% 28% 13% 3	180
	21st to end	Day	32% 22% 28% 16% 3	198
January	1st to 10th	Night	21% 21% 37% 19% 3	760
	11th to 20th	Night	23% 16% 33% 24% 3	736
	21st to end	Night	18% 20% 39% 21% 2	792
February	1st to 10th	Night	23% 20% 34% 21% 2	720
	11th to 20th	Night	24% 20% 39% 16% 1	703
	21st to end	Night	26% 19% 35% 17% 3	592
March	1st to 10th	Night	23% 19% 34% 21% 3	720
	11th to 20th	Night	26% 17% 32% 20% 5%	720
	21st to end	Night	21% 17% 36% 19% 6%	792
April	1st to 10th	Night	24% 19% 33% 20% 5%	720
	11th to 20th	Night	21% 15% 34% 22% 8%	711
	21st to end	Night	23% 13% 31% 26% 7%	720
May	1st to 10th	Night	27% 12% 24% 25% 12%	501
	11th to 20th	Night	20% 8% 30% 34% 6% 1	354
	21st to end	Night	19% 6% 21% 37% 17% 1	389
June	1st to 10th	Night	16% 3 26% 37% 19%	360
	11th to 20th	Night	15% 6% 26% 37% 16%	360
	21st to end	Night	13% 3 24% 48% 13%	360
July	1st to 10th	Night	12% 3 21% 39% 23% 2	350
	11th to 20th	Night	9% 4 21% 41% 24% 1	348
	21st to end	Night	12% 3 21% 39% 23% 2	463
August	1st to 10th	Night	14% 1 15% 43% 26% 2	537
	11th to 20th	Night	15% 3 12% 38% 30% 2	605
	21st to end	Night	15% 4 18% 34% 28% 2	792
September	1st to 10th	Night	19% 5% 20% 34% 21% 2	720
	11th to 20th	Night	17% 4 20% 30% 24% 5%	720
	21st to end	Night	20% 7% 21% 34% 18% 2	720
October	1st to 10th	Night	25% 8% 19% 27% 18% 3	720
	11th to 20th	Night	22% 10% 26% 32% 9% 1	720
	21st to end	Night	26% 12% 28% 27% 6%	792
November	1st to 10th	Night	16% 12% 32% 29% 10% 1	740
	11th to 20th	Night	22% 17% 27% 26% 6% 1	760
	21st to end	Night	21% 16% 31% 26% 5% 1	760
December	1st to 10th	Night	27% 17% 32% 18% 5%	760
	11th to 20th	Night	23% 17% 31% 24% 4	760
	21st to end	Night	25% 15% 34% 22% 3	836

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