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 2024-01-27.

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	13% 7% 3 6% 5% 3 5% 5% 5% 8% 42%	74924
	Night	14% 7% 3 5% 5% 3 4 4 5% 7% 44%	75138
Transparency	Day	41% 5% 11% 24% 15% 3	74628
	Night	41% 5% 10% 24% 18% 4	74955
Seeing	Day	17% 13% 26% 24% 15% 5%	14367
	Night	18% 13% 26% 27% 15% 2	24317

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	17% 10% 5% 8% 6% 3 3 4 4 4 36%	1517
	11th to 20th	Day	19% 10% 4 6% 6% 3 4 5% 5% 6% 31%	1543
	21st to end	Day	12% 12% 4 9% 5% 2 5% 4 4 6% 36%	1836
February	1st to 10th	Day	17% 11% 5% 7% 4 3 4 4 4 5% 36%	1782
	11th to 20th	Day	16% 10% 5% 7% 6% 2 4 4 4 6% 35%	1748
	21st to end	Day	16% 11% 4 7% 6% 3 4 4 5% 5% 34%	1480
March	1st to 10th	Day	15% 9% 4 6% 5% 3 5% 4 4 5% 40%	1800
	11th to 20th	Day	19% 9% 5% 6% 6% 3 3 4 4 6% 35%	1863
	21st to end	Day	19% 9% 4 6% 6% 3 5% 4 5% 6% 32%	2376
April	1st to 10th	Day	11% 7% 2 5% 5% 2 4 5% 6% 7% 46%	2160
	11th to 20th	Day	14% 7% 3 7% 6% 3 4 5% 4 6% 40%	2134
	21st to end	Day	18% 7% 2 6% 5% 3 4 4 4 7% 40%	2160
May	1st to 10th	Day	17% 6% 3 6% 6% 3 5% 6% 6% 8% 36%	2312
	11th to 20th	Day	17% 6% 2 5% 5% 3 6% 4 5% 7% 39%	2301
	21st to end	Day	9% 6% 3 6% 7% 4 7% 6% 7% 11% 35%	2648
June	1st to 10th	Day	9% 4 3 6% 4 2 6% 5% 6% 9% 45%	2520
	11th to 20th	Day	5% 3 2 4 5% 3 6% 6% 7% 10% 48%	2520
	21st to end	Day	5% 4 2 5% 6% 3 6% 5% 8% 12% 44%	2520
July	1st to 10th	Day	10% 5% 2 5% 6% 4 6% 7% 8% 10% 39%	2520
	11th to 20th	Day	5% 4 2 4 5% 3 5% 6% 7% 10% 49%	2520
	21st to end	Day	7% 4 2 5% 5% 3 7% 6% 7% 10% 42%	2734
August	1st to 10th	Day	8% 3 2 5% 5% 4 5% 6% 7% 11% 43%	2148
	11th to 20th	Day	9% 5% 2 5% 5% 4 5% 5% 6% 11% 43%	2125
	21st to end	Day	7% 5% 2 4 4 3 5% 5% 7% 10% 47%	2376
September	1st to 10th	Day	11% 5% 3 5% 6% 3 5% 5% 5% 7% 46%	2160
	11th to 20th	Day	9% 5% 2 4 6% 3 4 5% 5% 8% 49%	2039
	21st to end	Day	11% 4 1 4 5% 2 4 4 5% 8% 53%	1980
October	1st to 10th	Day	9% 4 2 4 4 3 3 4 4 7% 56%	1969
	11th to 20th	Day	12% 6% 2 5% 4 3 3 4 4 6% 50%	1800
	21st to end	Day	20% 7% 2 4 3 3 3 3 4 6% 44%	1863
November	1st to 10th	Day	9% 4 2 5% 4 2 4 4 5% 6% 53%	1672
	11th to 20th	Day	15% 6% 2 5% 5% 3 4 4 4 6% 46%	1710
	21st to end	Day	19% 10% 3 4 4 2 3 3 4 5% 43%	1710
December	1st to 10th	Day	17% 10% 4 6% 4 2 4 3 5% 5% 38%	1677
	11th to 20th	Day	13% 11% 4 8% 8% 3 4 4 5% 5% 35%	1918
	21st to end	Day	19% 16% 5% 8% 6% 3 4 4 4 5% 28%	2783
January	1st to 10th	Night	15% 10% 4 7% 6% 3 4 3 4 6% 37%	2648
	11th to 20th	Night	19% 11% 5% 8% 6% 3 3 4 4 5% 33%	2636
	21st to end	Night	16% 9% 5% 8% 6% 3 4 4 5% 6% 36%	2665
February	1st to 10th	Night	20% 13% 5% 7% 4 2 4 4 4 4 33%	2175
	11th to 20th	Night	16% 7% 4 6% 6% 3 3 4 4 6% 39%	2098
	21st to end	Night	20% 8% 4 7% 5% 3 5% 3 4 5% 36%	1776
March	1st to 10th	Night	17% 8% 3 5% 5% 3 5% 4 4 5% 43%	2160
	11th to 20th	Night	19% 8% 4 6% 5% 3 3 4 4 6% 39%	2109
	21st to end	Night	20% 10% 3 5% 5% 3 4 5% 4 7% 34%	1980
April	1st to 10th	Night	12% 6% 2 5% 5% 3 5% 5% 5% 8% 47%	1800
	11th to 20th	Night	17% 6% 2 4 4 3 4 4 5% 7% 45%	1775
	21st to end	Night	19% 6% 3 5% 5% 2 5% 4 5% 8% 38%	1800
May	1st to 10th	Night	16% 6% 3 5% 4 3 4 4 4 7% 43%	1647
	11th to 20th	Night	13% 6% 3 6% 6% 4 4 6% 5% 8% 41%	1592
	21st to end	Night	6% 4 2 6% 6% 4 6% 5% 7% 12% 43%	1623
June	1st to 10th	Night	11% 4 2 4 4 2 4 5% 6% 8% 49%	1440
	11th to 20th	Night	4 4 2 4 4 2 5% 5% 6% 8% 56%	1440
	21st to end	Night	4 2 2 3 4 3 4 6% 8% 12% 52%	1440
July	1st to 10th	Night	7% 4 2 4 6% 3 5% 5% 7% 10% 48%	1440
	11th to 20th	Night	6% 5% 2 4 4 3 4 5% 5% 8% 56%	1440
	21st to end	Night	6% 3 2 4 5% 4 5% 5% 7% 10% 50%	1579
August	1st to 10th	Night	6% 5% 1 4 4 3 5% 4 6% 9% 54%	1790
	11th to 20th	Night	7% 4 2 4 4 3 4 5% 6% 9% 52%	1776
	21st to end	Night	7% 4 2 5% 4 3 5% 5% 6% 8% 52%	1980
September	1st to 10th	Night	12% 5% 2 4 3 3 4 3 4 6% 54%	1800
	11th to 20th	Night	9% 5% 2 4 5% 3 4 4 6% 7% 52%	1902
	21st to end	Night	11% 4 2 4 4 2 4 3 5% 7% 55%	1980
October	1st to 10th	Night	8% 5% 2 5% 4 2 4 4 3 6% 57%	1988
	11th to 20th	Night	15% 5% 2 3 4 2 3 3 4 5% 53%	2160
	21st to end	Night	18% 8% 2 4 4 2 3 3 4 4 46%	2492
November	1st to 10th	Night	12% 4 2 4 3 2 3 4 4 6% 56%	2406
	11th to 20th	Night	14% 5% 2 5% 5% 2 3 3 4 6% 50%	2470
	21st to end	Night	18% 6% 3 5% 4 3 4 3 3 5% 47%	2470
December	1st to 10th	Night	18% 10% 3 5% 5% 3 4 4 4 6% 38%	2498
	11th to 20th	Night	16% 9% 4 5% 4 2 4 5% 4 5% 40%	3279
	21st to end	Night	17% 15% 5% 8% 6% 4 5% 4 3 5% 28%	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	51% 3 8% 24% 11% 2	1518
	11th to 20th	Day	53% 5% 10% 22% 10%	1543
	21st to end	Day	50% 3 11% 24% 9% 2	1836
February	1st to 10th	Day	51% 3 11% 23% 11% 1	1782
	11th to 20th	Day	52% 4 9% 21% 12% 3	1758
	21st to end	Day	51% 4 10% 18% 12% 5%	1480
March	1st to 10th	Day	47% 4 6% 24% 17% 2	1800
	11th to 20th	Day	52% 4 11% 20% 11% 2	1863
	21st to end	Day	53% 5% 12% 20% 9% 1	2376
April	1st to 10th	Day	37% 5% 13% 27% 17% 2	2160
	11th to 20th	Day	45% 4 9% 21% 17% 3	2134
	21st to end	Day	45% 5% 9% 26% 12% 2	2160
May	1st to 10th	Day	45% 7% 13% 25% 9% 1	2312
	11th to 20th	Day	45% 7% 11% 20% 15% 2	2305
	21st to end	Day	41% 9% 15% 21% 11% 2	2648
June	1st to 10th	Day	35% 6% 13% 25% 19% 2	2520
	11th to 20th	Day	28% 8% 13% 28% 21% 3	2520
	21st to end	Day	31% 8% 15% 23% 18% 5%	2520
July	1st to 10th	Day	38% 8% 14% 23% 13% 4	2451
	11th to 20th	Day	29% 8% 16% 25% 18% 3	2445
	21st to end	Day	34% 8% 14% 29% 13% 2	2582
August	1st to 10th	Day	33% 9% 14% 30% 13% 1	2136
	11th to 20th	Day	35% 6% 13% 28% 15% 2	2125
	21st to end	Day	31% 7% 14% 25% 18% 5%	2376
September	1st to 10th	Day	36% 5% 10% 27% 18% 4	2160
	11th to 20th	Day	33% 6% 9% 26% 24% 2	2039
	21st to end	Day	31% 5% 6% 27% 26% 5%	1980
October	1st to 10th	Day	29% 4 10% 26% 26% 5%	1969
	11th to 20th	Day	36% 4 8% 25% 21% 7%	1800
	21st to end	Day	42% 4 6% 25% 19% 3	1863
November	1st to 10th	Day	31% 5% 10% 27% 21% 6%	1672
	11th to 20th	Day	41% 3 7% 24% 21% 5%	1710
	21st to end	Day	45% 3 8% 25% 17% 3	1710
December	1st to 10th	Day	48% 3 11% 24% 12% 1	1677
	11th to 20th	Day	52% 4 8% 24% 10% 2	1915
	21st to end	Day	59% 4 12% 15% 10%	2783
January	1st to 10th	Night	48% 4 9% 23% 15% 2	2648
	11th to 20th	Night	54% 4 8% 21% 11% 1	2636
	21st to end	Night	50% 4 11% 22% 12% 2	2665
February	1st to 10th	Night	56% 3 9% 20% 11% 1	2175
	11th to 20th	Night	48% 3 8% 23% 16% 2	2099
	21st to end	Night	52% 3 9% 19% 14% 3	1776
March	1st to 10th	Night	46% 4 7% 18% 21% 5%	2160
	11th to 20th	Night	48% 4 11% 19% 14% 3	2109
	21st to end	Night	51% 5% 11% 21% 11% 2	1980
April	1st to 10th	Night	37% 4 10% 27% 19% 3	1800
	11th to 20th	Night	39% 4 9% 22% 19% 6%	1775
	21st to end	Night	45% 6% 8% 23% 16% 3	1800
May	1st to 10th	Night	40% 6% 10% 26% 15% 2	1647
	11th to 20th	Night	41% 6% 12% 24% 14% 2	1593
	21st to end	Night	33% 8% 16% 23% 16% 4	1624
June	1st to 10th	Night	32% 6% 13% 25% 22% 3	1440
	11th to 20th	Night	25% 5% 15% 25% 25% 5%	1440
	21st to end	Night	23% 7% 17% 28% 18% 7%	1440
July	1st to 10th	Night	29% 8% 15% 26% 16% 5%	1400
	11th to 20th	Night	27% 6% 15% 29% 17% 6%	1392
	21st to end	Night	27% 7% 15% 33% 17% 2	1491
August	1st to 10th	Night	27% 7% 18% 27% 20% 2	1778
	11th to 20th	Night	28% 7% 13% 28% 22% 2	1776
	21st to end	Night	28% 7% 14% 25% 20% 5%	1980
September	1st to 10th	Night	33% 5% 8% 29% 20% 5%	1800
	11th to 20th	Night	30% 6% 7% 28% 24% 5%	1902
	21st to end	Night	31% 4 8% 26% 24% 7%	1980
October	1st to 10th	Night	30% 4 7% 24% 29% 6%	1988
	11th to 20th	Night	35% 4 6% 23% 24% 8%	2160
	21st to end	Night	43% 3 6% 24% 18% 6%	2492
November	1st to 10th	Night	30% 4 9% 25% 26% 6%	2406
	11th to 20th	Night	37% 3 7% 24% 22% 7%	2470
	21st to end	Night	41% 3 8% 25% 21% 2	2470
December	1st to 10th	Night	48% 4 10% 23% 13% 1	2498
	11th to 20th	Night	46% 4 7% 24% 17% 2	3281
	21st to end	Night	59% 4 9% 16% 10% 2	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	26% 24% 31% 16% 3	270
	11th to 20th	Day	29% 29% 32% 9% 1	270
	21st to end	Day	22% 34% 33% 10% 1	282
February	1st to 10th	Day	25% 36% 28% 10% 2	240
	11th to 20th	Day	32% 32% 28% 7% 1	240
	21st to end	Day	33% 22% 32% 12% 1 1	198
March	1st to 10th	Day	24% 30% 33% 10% 3	240
	11th to 20th	Day	29% 27% 30% 11% 3	249
	21st to end	Day	29% 22% 30% 15% 4	462
April	1st to 10th	Day	16% 26% 32% 20% 6%	420
	11th to 20th	Day	22% 20% 26% 22% 8% 1	412
	21st to end	Day	23% 19% 33% 16% 8% 1	420
May	1st to 10th	Day	22% 18% 31% 19% 8% 1	423
	11th to 20th	Day	22% 11% 30% 24% 10% 3	447
	21st to end	Day	12% 8% 30% 29% 15% 7%	602
June	1st to 10th	Day	13% 5% 22% 28% 24% 8%	630
	11th to 20th	Day	6% 6% 26% 40% 17% 6%	630
	21st to end	Day	7% 7% 31% 31% 17% 7%	630
July	1st to 10th	Day	12% 3 17% 27% 24% 17%	621
	11th to 20th	Day	7% 4 19% 36% 24% 10%	618
	21st to end	Day	8% 3 20% 31% 30% 7%	680
August	1st to 10th	Day	10% 4 17% 32% 25% 12%	446
	11th to 20th	Day	15% 3 19% 29% 26% 8%	439
	21st to end	Day	11% 2 18% 26% 29% 13%	495
September	1st to 10th	Day	10% 4 20% 30% 26% 10%	450
	11th to 20th	Day	10% 4 14% 30% 30% 12%	450
	21st to end	Day	15% 9% 21% 23% 21% 10%	450
October	1st to 10th	Day	10% 7% 30% 30% 18% 6%	439
	11th to 20th	Day	19% 17% 37% 20% 6% 1	270
	21st to end	Day	29% 18% 32% 18% 4	297
November	1st to 10th	Day	12% 18% 37% 21% 12%	270
	11th to 20th	Day	16% 25% 32% 22% 4	270
	21st to end	Day	28% 19% 28% 17% 6% 1	270
December	1st to 10th	Day	20% 26% 31% 15% 6% 2	270
	11th to 20th	Day	25% 21% 33% 17% 3	270
	21st to end	Day	27% 28% 32% 11% 1	297
January	1st to 10th	Night	22% 25% 29% 21% 3	950
	11th to 20th	Night	26% 26% 29% 16% 3	950
	21st to end	Night	21% 23% 35% 20% 1	1025
February	1st to 10th	Night	26% 23% 31% 18% 2	735
	11th to 20th	Night	23% 26% 30% 19% 2	703
	21st to end	Night	26% 21% 33% 18% 1	592
March	1st to 10th	Night	23% 18% 33% 22% 4	720
	11th to 20th	Night	25% 16% 33% 21% 6%	680
	21st to end	Night	27% 13% 28% 26% 6% 1	594
April	1st to 10th	Night	14% 19% 35% 24% 7%	540
	11th to 20th	Night	21% 14% 26% 26% 13% 1	533
	21st to end	Night	22% 11% 30% 26% 8% 2	540
May	1st to 10th	Night	19% 8% 32% 29% 11% 1	540
	11th to 20th	Night	17% 8% 25% 31% 16% 2	531
	21st to end	Night	8% 4 25% 35% 24% 4	584
June	1st to 10th	Night	14% 3 18% 36% 27% 2	540
	11th to 20th	Night	6% 3 21% 43% 25% 2	540
	21st to end	Night	4 3 23% 39% 27% 3	540
July	1st to 10th	Night	9% 2 11% 33% 35% 11%	525
	11th to 20th	Night	7% 3 13% 34% 37% 6%	522
	21st to end	Night	7% 3 15% 36% 33% 7%	591
August	1st to 10th	Night	8% 1 12% 36% 37% 6%	537
	11th to 20th	Night	9% 1 13% 36% 36% 4	534
	21st to end	Night	8% 1 14% 33% 36% 7%	594
September	1st to 10th	Night	12% 2 15% 30% 35% 6%	540
	11th to 20th	Night	11% 2 16% 28% 36% 7%	642
	21st to end	Night	12% 7% 23% 28% 25% 6%	720
October	1st to 10th	Night	11% 7% 20% 35% 22% 4	720
	11th to 20th	Night	17% 13% 30% 25% 13% 2	720
	21st to end	Night	23% 14% 30% 23% 9% 1	792
November	1st to 10th	Night	14% 13% 30% 30% 12% 1	740
	11th to 20th	Night	15% 18% 29% 28% 9% 1	760
	21st to end	Night	22% 16% 27% 27% 9%	760
December	1st to 10th	Night	23% 18% 29% 24% 6%	788
	11th to 20th	Night	24% 16% 29% 24% 6%	950
	21st to end	Night	26% 22% 30% 18% 3	1045

Page generated at 2024-01-24 08:37:31. Version ac07

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