Garden of he Gods Recreation Area
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Garden of he Gods Recreation Area clear sky chart from 2005-11-06 to 2026-05-17.

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	12% 8% 3 7% 4 4 4 4 6% 7% 41%	131725
	Night	14% 8% 3 6% 4 4 4 3 5% 6% 43%	131311
Transparency	Day	41% 4 10% 25% 17% 3	135340
	Night	41% 4 10% 24% 18% 3	135772
Seeing	Day	18% 14% 27% 23% 14% 5%	17491
	Night	18% 13% 26% 26% 14% 2	27371

By Month

Percentage Cloud Cover SE (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	14% 10% 5% 11% 5% 5% 5% 3 4 5% 34%	4691
	11th to 20th	Day	11% 8% 3 7% 5% 4 4 3 4 5% 45%	4788
	21st to end	Day	17% 12% 4 9% 5% 4 3 3 4 5% 35%	5812
February	1st to 10th	Day	16% 12% 4 8% 4 3 4 3 5% 5% 37%	2080
	11th to 20th	Day	16% 11% 4 9% 5% 3 4 3 4 6% 36%	2048
	21st to end	Day	14% 11% 3 8% 5% 4 4 3 5% 6% 35%	1730
March	1st to 10th	Day	17% 12% 3 6% 3 3 4 3 3 4 40%	4580
	11th to 20th	Day	11% 9% 3 6% 3 3 3 3 4 6% 49%	4813
	21st to end	Day	12% 8% 3 7% 5% 4 5% 3 5% 7% 40%	6099
April	1st to 10th	Day	12% 8% 2 6% 4 4 4 3 6% 7% 44%	2520
	11th to 20th	Day	14% 8% 3 8% 4 4 4 4 5% 6% 41%	2494
	21st to end	Day	17% 7% 3 6% 4 4 4 3 5% 8% 40%	2520
May	1st to 10th	Day	17% 8% 3 9% 6% 6% 5% 5% 7% 8% 26%	5934
	11th to 20th	Day	16% 7% 3 7% 5% 5% 5% 4 6% 8% 34%	5939
	21st to end	Day	13% 7% 2 7% 5% 5% 5% 4 6% 7% 38%	6746
June	1st to 10th	Day	10% 5% 3 6% 4 4 5% 4 6% 9% 44%	2800
	11th to 20th	Day	6% 4 2 5% 4 4 6% 4 7% 10% 47%	2800
	21st to end	Day	5% 5% 1 5% 5% 5% 6% 5% 8% 11% 44%	2800
July	1st to 10th	Day	10% 5% 2 6% 4 4 5% 4 7% 9% 44%	6360
	11th to 20th	Day	6% 4 2 6% 4 5% 5% 5% 8% 11% 43%	6360
	21st to end	Day	7% 6% 3 8% 6% 6% 7% 5% 8% 11% 34%	6875
August	1st to 10th	Day	7% 4 1 4 3 4 4 4 7% 10% 52%	3905
	11th to 20th	Day	8% 5% 2 6% 5% 5% 5% 5% 7% 10% 42%	3849
	21st to end	Day	6% 4 1 4 3 4 4 4 6% 9% 56%	4312
September	1st to 10th	Day	10% 5% 3 6% 5% 4 5% 4 5% 7% 47%	2400
	11th to 20th	Day	9% 5% 2 6% 4 4 4 4 5% 8% 50%	2265
	21st to end	Day	12% 5% 1 5% 4 3 4 3 5% 7% 51%	2200
October	1st to 10th	Day	9% 4 2 5% 3 3 3 3 4 7% 58%	2187
	11th to 20th	Day	11% 6% 2 5% 3 3 3 3 5% 6% 53%	2000
	21st to end	Day	20% 7% 2 5% 3 3 3 3 4 6% 46%	2069
November	1st to 10th	Day	9% 6% 2 6% 4 4 4 4 5% 5% 51%	1852
	11th to 20th	Day	14% 8% 2 6% 4 4 4 3 4 6% 46%	1890
	21st to end	Day	19% 11% 3 5% 3 2 4 2 4 5% 42%	1890
December	1st to 10th	Day	12% 10% 3 6% 3 3 3 2 4 5% 49%	2959
	11th to 20th	Day	13% 10% 5% 10% 6% 4 3 3 5% 5% 36%	3088
	21st to end	Day	23% 15% 4 9% 5% 4 4 3 4 5% 25%	4070
January	1st to 10th	Night	16% 11% 4 8% 4 3 3 3 4 5% 37%	8232
	11th to 20th	Night	13% 9% 4 10% 4 4 4 2 4 4 41%	8187
	21st to end	Night	18% 10% 5% 7% 4 4 3 3 4 5% 38%	8402
February	1st to 10th	Night	18% 13% 4 8% 4 3 4 3 4 4 33%	2537
	11th to 20th	Night	17% 8% 3 7% 5% 4 3 3 4 6% 38%	2458
	21st to end	Night	19% 8% 3 8% 4 4 4 3 4 5% 38%	2076
March	1st to 10th	Night	19% 10% 4 7% 5% 4 4 3 4 5% 36%	5493
	11th to 20th	Night	13% 6% 2 5% 3 3 4 3 5% 6% 48%	5408
	21st to end	Night	16% 8% 3 8% 5% 5% 4 4 5% 6% 37%	5072
April	1st to 10th	Night	13% 6% 2 6% 4 4 4 4 5% 8% 46%	2100
	11th to 20th	Night	15% 7% 2 5% 3 4 4 4 5% 7% 44%	2075
	21st to end	Night	17% 7% 3 6% 4 4 5% 4 5% 7% 38%	2100
May	1st to 10th	Night	17% 10% 3 7% 4 4 5% 4 6% 9% 32%	4179
	11th to 20th	Night	14% 8% 3 8% 5% 5% 4 4 6% 8% 36%	4086
	21st to end	Night	13% 6% 2 6% 5% 5% 5% 4 6% 9% 39%	4118
June	1st to 10th	Night	11% 5% 2 5% 3 3 4 4 7% 9% 48%	1600
	11th to 20th	Night	5% 4 2 5% 3 3 5% 4 6% 9% 54%	1600
	21st to end	Night	4 3 1 4 4 3 5% 4 8% 12% 52%	1600
July	1st to 10th	Night	9% 5% 2 6% 5% 4 4 4 6% 7% 50%	3618
	11th to 20th	Night	7% 4 2 5% 4 5% 4 4 6% 9% 51%	3617
	21st to end	Night	6% 5% 2 6% 5% 5% 5% 5% 8% 13% 41%	3976
August	1st to 10th	Night	5% 4 1 4 3 4 4 3 5% 8% 58%	3244
	11th to 20th	Night	7% 4 2 6% 4 4 4 3 6% 8% 53%	3200
	21st to end	Night	4 3 1 4 3 3 4 4 5% 8% 60%	3586
September	1st to 10th	Night	11% 5% 2 5% 3 4 4 2 4 5% 54%	2000
	11th to 20th	Night	8% 5% 2 5% 4 4 4 3 6% 7% 53%	2114
	21st to end	Night	13% 5% 1 5% 4 3 4 3 5% 6% 53%	2200
October	1st to 10th	Night	7% 5% 2 5% 3 4 3 3 3 6% 60%	2210
	11th to 20th	Night	14% 5% 2 4 3 3 2 3 4 5% 56%	2400
	21st to end	Night	19% 8% 2 5% 3 3 2 3 4 5% 46%	2770
November	1st to 10th	Night	12% 5% 2 5% 3 3 3 3 4 6% 54%	2666
	11th to 20th	Night	13% 6% 2 6% 4 3 3 3 4 6% 50%	2730
	21st to end	Night	18% 7% 2 5% 4 4 3 3 4 5% 45%	2730
December	1st to 10th	Night	17% 10% 2 7% 4 3 3 2 3 4 43%	4438
	11th to 20th	Night	17% 9% 3 5% 3 3 4 3 4 6% 42%	5339
	21st to end	Night	24% 14% 4 8% 4 4 4 3 3 4 27%	7150

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	54% 3 12% 24% 7% 1	4692
	11th to 20th	Day	42% 3 6% 28% 18% 2	4788
	21st to end	Day	53% 2 9% 18% 11% 6%	5812
February	1st to 10th	Day	50% 3 12% 23% 11% 1	2080
	11th to 20th	Day	51% 3 9% 20% 13% 3	2058
	21st to end	Day	50% 4 9% 20% 13% 5%	1730
March	1st to 10th	Day	49% 3 3 21% 20% 4	4580
	11th to 20th	Day	38% 3 8% 27% 20% 4	4813
	21st to end	Day	44% 4 12% 26% 15% 1	6101
April	1st to 10th	Day	38% 5% 13% 25% 17% 2	2520
	11th to 20th	Day	44% 4 10% 22% 17% 3	2494
	21st to end	Day	44% 4 10% 28% 12% 2	2520
May	1st to 10th	Day	53% 7% 10% 19% 9%	5970
	11th to 20th	Day	48% 6% 11% 23% 12% 1	5943
	21st to end	Day	43% 6% 9% 20% 18% 3	6760
June	1st to 10th	Day	36% 6% 12% 25% 18% 3	2800
	11th to 20th	Day	30% 8% 12% 26% 21% 3	2800
	21st to end	Day	31% 7% 15% 24% 18% 5%	2800
July	1st to 10th	Day	36% 5% 10% 29% 18% 2	6291
	11th to 20th	Day	34% 7% 17% 30% 12% 1	6285
	21st to end	Day	43% 6% 17% 25% 8% 1	6679
August	1st to 10th	Day	27% 6% 13% 34% 19% 1	3893
	11th to 20th	Day	36% 5% 13% 28% 17% 1	3885
	21st to end	Day	25% 5% 11% 36% 21% 3	4311
September	1st to 10th	Day	35% 5% 9% 26% 19% 5%	2400
	11th to 20th	Day	32% 5% 10% 25% 25% 2	2265
	21st to end	Day	34% 5% 6% 25% 26% 4	2200
October	1st to 10th	Day	17% 2 6% 23% 45% 7%	3564
	11th to 20th	Day	23% 3 8% 24% 33% 9%	3240
	21st to end	Day	33% 3 4 27% 28% 4	3320
November	1st to 10th	Day	34% 5% 9% 27% 20% 5%	1852
	11th to 20th	Day	41% 3 7% 24% 20% 5%	1890
	21st to end	Day	46% 2 8% 24% 17% 2	1890
December	1st to 10th	Day	40% 2 10% 30% 16% 1	2959
	11th to 20th	Day	51% 4 9% 24% 11% 2	3085
	21st to end	Day	62% 3 12% 15% 7%	4070
January	1st to 10th	Night	50% 2 12% 26% 9% 1	8233
	11th to 20th	Night	47% 3 4 24% 19% 3	8187
	21st to end	Night	51% 2 8% 22% 15% 2	8402
February	1st to 10th	Night	55% 3 9% 20% 11% 1	2537
	11th to 20th	Night	49% 3 7% 23% 15% 3	2459
	21st to end	Night	49% 3 8% 21% 15% 3	2076
March	1st to 10th	Night	51% 4 5% 16% 20% 3	5493
	11th to 20th	Night	37% 3 10% 22% 20% 8%	5408
	21st to end	Night	47% 4 11% 24% 12% 1	5072
April	1st to 10th	Night	38% 4 11% 27% 17% 3	2100
	11th to 20th	Night	40% 4 10% 22% 19% 5%	2075
	21st to end	Night	45% 6% 8% 23% 16% 2	2100
May	1st to 10th	Night	48% 6% 14% 22% 9% 1	4206
	11th to 20th	Night	47% 6% 12% 23% 12% 1	4087
	21st to end	Night	41% 6% 12% 25% 14% 3	4126
June	1st to 10th	Night	33% 6% 12% 25% 21% 3	1600
	11th to 20th	Night	27% 5% 14% 24% 25% 5%	1600
	21st to end	Night	23% 6% 16% 28% 19% 7%	1600
July	1st to 10th	Night	34% 6% 10% 27% 21% 3	3580
	11th to 20th	Night	30% 7% 18% 30% 12% 2	3572
	21st to end	Night	34% 5% 22% 28% 10% 1	3861
August	1st to 10th	Night	25% 5% 15% 36% 18% 1	3232
	11th to 20th	Night	29% 5% 14% 29% 20% 2	3230
	21st to end	Night	22% 5% 10% 37% 23% 3	3586
September	1st to 10th	Night	33% 4 8% 28% 22% 6%	2000
	11th to 20th	Night	30% 5% 8% 28% 24% 5%	2114
	21st to end	Night	33% 4 8% 24% 24% 7%	2200
October	1st to 10th	Night	18% 2 4 17% 48% 11%	3613
	11th to 20th	Night	22% 2 5% 23% 40% 8%	3899
	21st to end	Night	33% 2 6% 24% 25% 10%	4469
November	1st to 10th	Night	32% 4 9% 25% 24% 5%	2666
	11th to 20th	Night	37% 3 7% 25% 22% 7%	2730
	21st to end	Night	43% 2 8% 25% 19% 2	2730
December	1st to 10th	Night	46% 3 8% 25% 17% 1	4438
	11th to 20th	Night	45% 3 10% 23% 18% 1	5341
	21st to end	Night	61% 3 9% 18% 7% 2	7150

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	27% 25% 30% 15% 3	330
	11th to 20th	Day	32% 29% 30% 7% 1	330
	21st to end	Day	25% 32% 33% 9% 1	363
February	1st to 10th	Day	24% 33% 29% 12% 1	330
	11th to 20th	Day	34% 31% 27% 6% 1	330
	21st to end	Day	33% 23% 33% 11% 1	273
March	1st to 10th	Day	29% 27% 32% 9% 4	330
	11th to 20th	Day	30% 28% 32% 9% 2	342
	21st to end	Day	28% 22% 32% 14% 3	594
April	1st to 10th	Day	20% 24% 32% 18% 4	540
	11th to 20th	Day	26% 20% 26% 20% 7% 1	532
	21st to end	Day	23% 19% 35% 15% 8% 1	540
May	1st to 10th	Day	23% 18% 32% 19% 7% 1	543
	11th to 20th	Day	23% 12% 30% 23% 9% 3	551
	21st to end	Day	14% 10% 31% 26% 14% 6%	704
June	1st to 10th	Day	14% 6% 24% 27% 22% 7%	730
	11th to 20th	Day	7% 6% 25% 39% 17% 6%	730
	21st to end	Day	7% 6% 31% 32% 17% 7%	730
July	1st to 10th	Day	12% 3 19% 28% 23% 15%	721
	11th to 20th	Day	7% 4 20% 36% 23% 9%	718
	21st to end	Day	8% 4 21% 31% 30% 7%	789
August	1st to 10th	Day	10% 4 19% 32% 24% 11%	526
	11th to 20th	Day	13% 3 20% 29% 26% 9%	519
	21st to end	Day	10% 2 18% 29% 29% 11%	583
September	1st to 10th	Day	10% 4 22% 31% 25% 9%	530
	11th to 20th	Day	9% 4 15% 30% 30% 12%	530
	21st to end	Day	17% 9% 22% 23% 20% 9%	530
October	1st to 10th	Day	9% 6% 28% 31% 20% 6%	517
	11th to 20th	Day	17% 16% 34% 22% 8% 2	330
	21st to end	Day	29% 18% 32% 17% 4	363
November	1st to 10th	Day	15% 20% 36% 19% 10%	330
	11th to 20th	Day	19% 24% 31% 22% 4	330
	21st to end	Day	32% 18% 27% 16% 6% 1	330
December	1st to 10th	Day	22% 27% 31% 13% 5% 2	330
	11th to 20th	Day	26% 22% 34% 15% 3	330
	21st to end	Day	29% 26% 33% 10% 1	363
January	1st to 10th	Night	22% 24% 29% 22% 3	1050
	11th to 20th	Night	26% 26% 29% 15% 3	1050
	21st to end	Night	22% 23% 34% 20% 1	1155
February	1st to 10th	Night	25% 22% 33% 18% 2	857
	11th to 20th	Night	26% 24% 29% 19% 1	823
	21st to end	Night	26% 21% 34% 18% 1	692
March	1st to 10th	Night	24% 18% 32% 21% 3	840
	11th to 20th	Night	25% 16% 34% 20% 5%	793
	21st to end	Night	27% 15% 29% 24% 5%	693
April	1st to 10th	Night	16% 20% 34% 24% 6%	630
	11th to 20th	Night	21% 15% 28% 24% 11% 1	623
	21st to end	Night	21% 12% 31% 26% 8% 1	630
May	1st to 10th	Night	20% 9% 32% 28% 10% 1	630
	11th to 20th	Night	17% 9% 25% 31% 16% 2	609
	21st to end	Night	9% 5% 26% 35% 22% 4	650
June	1st to 10th	Night	13% 3 19% 37% 26% 2	600
	11th to 20th	Night	7% 3 21% 43% 24% 2	600
	21st to end	Night	5% 3 23% 39% 28% 3	600
July	1st to 10th	Night	9% 3 12% 32% 35% 10%	585
	11th to 20th	Night	7% 3 13% 36% 36% 6%	582
	21st to end	Night	7% 3 14% 35% 34% 6%	657
August	1st to 10th	Night	9% 1 12% 35% 37% 6%	597
	11th to 20th	Night	9% 2 14% 36% 37% 4	594
	21st to end	Night	7% 2 14% 34% 36% 7%	660
September	1st to 10th	Night	12% 3 15% 30% 35% 6%	600
	11th to 20th	Night	10% 3 15% 30% 35% 6%	714
	21st to end	Night	13% 7% 23% 28% 24% 5%	800
October	1st to 10th	Night	10% 7% 19% 36% 23% 4	800
	11th to 20th	Night	16% 13% 29% 25% 16% 2	800
	21st to end	Night	24% 14% 30% 22% 8% 1	880
November	1st to 10th	Night	15% 12% 32% 29% 11% 1	820
	11th to 20th	Night	16% 18% 30% 28% 9%	840
	21st to end	Night	23% 17% 26% 26% 8%	840
December	1st to 10th	Night	23% 19% 29% 24% 5%	872
	11th to 20th	Night	24% 17% 30% 23% 6%	1050
	21st to end	Night	28% 22% 29% 17% 3	1155

Page generated at 2026-05-14 00:58:54. Version ac07

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