Animal Park at the Conservators Center
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Animal Park at the Conservators Center clear sky chart from 2005-11-06 to 2026-02-01.

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 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% 6% 2 6% 4 4 4 4 6% 8% 43%	127036
	Night	13% 6% 2 6% 4 4 4 3 5% 7% 45%	124978
Transparency	Day	38% 5% 12% 22% 18% 5%	130642
	Night	38% 5% 10% 21% 20% 6%	129441
Seeing	Day	16% 9% 24% 25% 19% 8%	16905
	Night	16% 8% 26% 31% 16% 2	27243

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	15% 6% 2 4 2 3 2 2 3 4 56%	4146
	11th to 20th	Day	11% 6% 2 5% 3 3 3 2 3 5% 57%	4150
	21st to end	Day	14% 8% 3 6% 4 4 4 3 3 4 47%	4565
February	1st to 10th	Day	13% 6% 2 6% 4 5% 4 4 6% 7% 43%	1800
	11th to 20th	Day	21% 7% 2 5% 4 4 3 3 4 5% 43%	1764
	21st to end	Day	18% 8% 2 6% 4 4 4 3 5% 6% 41%	1790
March	1st to 10th	Day	17% 7% 2 6% 4 4 3 3 5% 7% 41%	4935
	11th to 20th	Day	9% 5% 2 5% 4 3 4 3 4 7% 53%	4980
	21st to end	Day	15% 7% 2 6% 4 4 4 3 5% 5% 45%	5465
April	1st to 10th	Day	10% 5% 1 3 3 4 4 4 6% 7% 53%	2303
	11th to 20th	Day	11% 5% 2 5% 4 4 4 3 5% 7% 49%	2374
	21st to end	Day	14% 5% 2 5% 4 4 5% 4 6% 7% 44%	2431
May	1st to 10th	Day	9% 7% 3 8% 5% 5% 5% 5% 9% 10% 35%	5862
	11th to 20th	Day	19% 8% 3 8% 4 5% 5% 5% 7% 9% 28%	5861
	21st to end	Day	12% 5% 2 6% 4 5% 5% 4 6% 10% 41%	6433
June	1st to 10th	Day	9% 5% 2 5% 5% 5% 4 5% 7% 11% 42%	2600
	11th to 20th	Day	8% 5% 2 6% 4 4 5% 4 7% 11% 44%	2600
	21st to end	Day	7% 4 2 6% 6% 5% 6% 5% 7% 11% 43%	2600
July	1st to 10th	Day	8% 5% 2 7% 5% 6% 6% 5% 8% 10% 38%	5900
	11th to 20th	Day	7% 6% 2 7% 6% 5% 6% 6% 10% 14% 31%	5900
	21st to end	Day	8% 6% 3 7% 5% 6% 6% 5% 8% 11% 34%	6424
August	1st to 10th	Day	17% 8% 3 8% 5% 5% 5% 5% 8% 10% 26%	4234
	11th to 20th	Day	8% 6% 2 7% 5% 6% 6% 5% 7% 11% 35%	4108
	21st to end	Day	6% 4 2 5% 4 4 4 4 7% 10% 50%	4312
September	1st to 10th	Day	10% 4 2 5% 4 4 4 4 6% 8% 48%	2400
	11th to 20th	Day	13% 6% 3 7% 4 4 4 4 5% 8% 42%	2223
	21st to end	Day	20% 8% 3 6% 3 4 4 3 6% 7% 37%	2179
October	1st to 10th	Day	14% 5% 3 5% 3 3 3 2 3 6% 53%	2000
	11th to 20th	Day	13% 4 2 4 3 3 4 2 4 5% 56%	2000
	21st to end	Day	12% 5% 2 5% 4 3 3 2 3 5% 57%	2200
November	1st to 10th	Day	13% 6% 2 5% 3 3 3 3 4 5% 54%	2057
	11th to 20th	Day	13% 5% 2 4 4 3 3 3 5% 6% 52%	2036
	21st to end	Day	12% 5% 2 6% 4 3 4 3 6% 6% 49%	1814
December	1st to 10th	Day	12% 6% 2 5% 3 3 4 3 5% 5% 52%	2680
	11th to 20th	Day	16% 6% 2 6% 3 3 4 4 4 5% 46%	3345
	21st to end	Day	16% 5% 2 6% 3 4 4 4 4 7% 44%	4565
January	1st to 10th	Night	12% 6% 2 4 3 3 3 3 4 5% 55%	6019
	11th to 20th	Night	12% 6% 2 5% 3 2 3 3 4 4 57%	6030
	21st to end	Night	14% 7% 2 6% 3 3 3 3 4 5% 49%	6633
February	1st to 10th	Night	17% 6% 2 5% 4 3 5% 4 5% 6% 44%	2601
	11th to 20th	Night	20% 7% 2 5% 4 2 3 3 5% 6% 43%	2518
	21st to end	Night	14% 7% 2 4 4 4 4 3 5% 7% 46%	1839
March	1st to 10th	Night	16% 7% 2 7% 4 4 4 3 4 5% 44%	4918
	11th to 20th	Night	10% 6% 2 4 3 3 4 3 4 7% 55%	4980
	21st to end	Night	13% 5% 2 5% 4 4 4 4 5% 6% 48%	5467
April	1st to 10th	Night	12% 7% 2 4 4 4 4 3 5% 7% 48%	2095
	11th to 20th	Night	11% 5% 2 5% 4 4 4 3 6% 7% 49%	1975
	21st to end	Night	12% 5% 2 6% 4 4 5% 4 6% 7% 46%	1985
May	1st to 10th	Night	11% 7% 3 7% 5% 5% 6% 4 6% 8% 37%	4033
	11th to 20th	Night	17% 9% 3 8% 4 4 4 4 4 8% 36%	4032
	21st to end	Night	15% 5% 2 6% 4 3 4 3 6% 9% 42%	4421
June	1st to 10th	Night	9% 5% 2 5% 4 5% 5% 6% 8% 10% 40%	1800
	11th to 20th	Night	8% 5% 2 7% 6% 5% 4 4 7% 12% 41%	1800
	21st to end	Night	6% 5% 2 5% 5% 5% 6% 6% 8% 12% 41%	1800
July	1st to 10th	Night	10% 5% 3 8% 6% 7% 7% 5% 7% 10% 33%	4058
	11th to 20th	Night	10% 7% 3 9% 7% 6% 7% 6% 8% 10% 26%	4057
	21st to end	Night	10% 7% 3 8% 5% 5% 6% 5% 8% 10% 33%	4427
August	1st to 10th	Night	19% 8% 3 7% 5% 5% 6% 5% 9% 10% 24%	2915
	11th to 20th	Night	7% 5% 2 6% 5% 6% 5% 5% 7% 10% 41%	2907
	21st to end	Night	6% 4 2 5% 4 5% 5% 4 6% 9% 50%	3586
September	1st to 10th	Night	9% 6% 2 7% 4 3 4 4 6% 8% 47%	2000
	11th to 20th	Night	13% 7% 3 6% 4 4 3 4 5% 7% 43%	2172
	21st to end	Night	18% 8% 3 6% 4 4 4 4 5% 5% 38%	2220
October	1st to 10th	Night	14% 6% 2 5% 4 4 4 3 4 6% 48%	2400
	11th to 20th	Night	13% 6% 2 4 4 3 3 2 4 5% 54%	2400
	21st to end	Night	11% 6% 2 4 3 4 4 2 4 4 56%	2640
November	1st to 10th	Night	14% 6% 2 5% 4 3 3 3 4 4 53%	2461
	11th to 20th	Night	12% 5% 2 5% 4 4 4 3 5% 6% 51%	2581
	21st to end	Night	13% 5% 2 5% 3 4 3 4 5% 6% 52%	2796
December	1st to 10th	Night	11% 6% 2 6% 3 4 4 3 4 5% 52%	4720
	11th to 20th	Night	17% 9% 3 7% 4 4 4 3 4 5% 41%	5059
	21st to end	Night	17% 6% 2 5% 3 3 3 3 5% 7% 46%	6633

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	34% 3 4 22% 30% 7%	4147
	11th to 20th	Day	32% 2 4 18% 36% 8%	4150
	21st to end	Day	42% 3 5% 23% 22% 5%	4565
February	1st to 10th	Day	41% 5% 10% 21% 20% 5%	1800
	11th to 20th	Day	45% 3 6% 21% 19% 6%	1773
	21st to end	Day	44% 4 10% 16% 19% 6%	1790
March	1st to 10th	Day	44% 4 6% 18% 18% 11%	4935
	11th to 20th	Day	31% 4 6% 19% 24% 16%	4980
	21st to end	Day	41% 3 9% 21% 19% 6%	5465
April	1st to 10th	Day	29% 5% 11% 24% 23% 8%	2303
	11th to 20th	Day	33% 5% 12% 22% 21% 7%	2374
	21st to end	Day	39% 5% 12% 24% 16% 4	2431
May	1st to 10th	Day	42% 6% 19% 22% 10% 2	5897
	11th to 20th	Day	51% 6% 12% 21% 8% 1	5865
	21st to end	Day	38% 6% 14% 22% 18% 2	6447
June	1st to 10th	Day	34% 8% 17% 25% 15% 1	2600
	11th to 20th	Day	34% 7% 19% 24% 15% 2	2600
	21st to end	Day	33% 9% 19% 24% 14% 1	2600
July	1st to 10th	Day	40% 7% 19% 20% 12% 3	5835
	11th to 20th	Day	41% 9% 29% 17% 4 1	5831
	21st to end	Day	43% 7% 17% 24% 10%	6240
August	1st to 10th	Day	52% 6% 19% 19% 5%	4221
	11th to 20th	Day	41% 6% 22% 22% 9% 1	4147
	21st to end	Day	29% 5% 16% 34% 14% 2	4312
September	1st to 10th	Day	33% 8% 15% 20% 19% 5%	2400
	11th to 20th	Day	40% 6% 10% 21% 20% 2	2223
	21st to end	Day	46% 6% 11% 19% 15% 4	2179
October	1st to 10th	Day	35% 3 6% 21% 26% 9%	3260
	11th to 20th	Day	21% 2 5% 22% 27% 22%	3240
	21st to end	Day	25% 2 9% 25% 25% 14%	3538
November	1st to 10th	Day	33% 3 8% 23% 26% 7%	2057
	11th to 20th	Day	34% 3 8% 23% 26% 7%	2036
	21st to end	Day	35% 4 8% 23% 26% 5%	1814
December	1st to 10th	Day	35% 3 7% 23% 26% 7%	2680
	11th to 20th	Day	42% 3 10% 18% 23% 5%	3342
	21st to end	Day	39% 4 12% 26% 18% 1	4565
January	1st to 10th	Night	31% 3 6% 19% 29% 11%	6019
	11th to 20th	Night	32% 3 5% 18% 35% 7%	6030
	21st to end	Night	39% 3 5% 22% 26% 5%	6633
February	1st to 10th	Night	41% 4 9% 22% 19% 4	2601
	11th to 20th	Night	43% 4 8% 17% 21% 7%	2520
	21st to end	Night	38% 4 9% 21% 20% 8%	1839
March	1st to 10th	Night	44% 4 5% 14% 23% 10%	4918
	11th to 20th	Night	31% 3 5% 17% 26% 17%	4980
	21st to end	Night	37% 3 8% 25% 23% 5%	5467
April	1st to 10th	Night	36% 4 11% 18% 24% 6%	2095
	11th to 20th	Night	34% 4 9% 23% 22% 7%	1975
	21st to end	Night	37% 6% 12% 23% 18% 5%	1985
May	1st to 10th	Night	44% 6% 16% 19% 14% 1	4060
	11th to 20th	Night	48% 6% 12% 20% 13% 1	4033
	21st to end	Night	38% 6% 14% 26% 14% 2	4429
June	1st to 10th	Night	36% 9% 17% 21% 16% 1	1800
	11th to 20th	Night	36% 8% 17% 23% 14% 2	1800
	21st to end	Night	33% 10% 18% 22% 14% 3	1800
July	1st to 10th	Night	45% 8% 16% 17% 12% 1	4015
	11th to 20th	Night	50% 11% 21% 13% 3 1	4006
	21st to end	Night	45% 7% 17% 22% 9%	4297
August	1st to 10th	Night	53% 6% 18% 16% 6%	2904
	11th to 20th	Night	37% 6% 21% 25% 10% 1	2934
	21st to end	Night	31% 6% 12% 30% 19% 2	3586
September	1st to 10th	Night	35% 8% 11% 23% 18% 5%	2000
	11th to 20th	Night	40% 6% 11% 18% 21% 3	2172
	21st to end	Night	47% 6% 11% 18% 14% 4	2220
October	1st to 10th	Night	40% 3 6% 20% 25% 6%	3920
	11th to 20th	Night	24% 2 6% 22% 28% 17%	3899
	21st to end	Night	25% 2 6% 27% 25% 15%	4252
November	1st to 10th	Night	35% 3 7% 21% 25% 8%	2461
	11th to 20th	Night	35% 4 7% 18% 26% 10%	2581
	21st to end	Night	34% 3 7% 23% 26% 6%	2796
December	1st to 10th	Night	35% 2 6% 22% 29% 5%	4720
	11th to 20th	Night	47% 3 8% 17% 16% 8%	5061
	21st to end	Night	38% 3 12% 24% 21% 2	6633

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	25% 20% 35% 15% 5%	330
	11th to 20th	Day	23% 23% 36% 13% 5%	330
	21st to end	Day	22% 20% 41% 15% 2	363
February	1st to 10th	Day	18% 17% 44% 17% 4	300
	11th to 20th	Day	37% 17% 34% 9% 3	300
	21st to end	Day	27% 16% 34% 19% 4	389
March	1st to 10th	Day	22% 15% 35% 21% 7%	500
	11th to 20th	Day	19% 15% 41% 18% 7%	500
	21st to end	Day	21% 15% 36% 23% 5% 1	550
April	1st to 10th	Day	19% 16% 35% 21% 9% 1	500
	11th to 20th	Day	13% 17% 28% 26% 11% 4	492
	21st to end	Day	17% 9% 29% 27% 15% 2	500
May	1st to 10th	Day	16% 12% 28% 27% 13% 4	503
	11th to 20th	Day	17% 7% 21% 29% 20% 7%	527
	21st to end	Day	16% 4 19% 25% 26% 9%	573
June	1st to 10th	Day	10% 4 19% 32% 25% 10%	530
	11th to 20th	Day	10% 3 16% 29% 29% 13%	530
	21st to end	Day	8% 3 14% 31% 32% 12%	530
July	1st to 10th	Day	10% 2 7% 29% 34% 17%	525
	11th to 20th	Day	6% 2 8% 26% 39% 20%	524
	21st to end	Day	8% 2 10% 31% 32% 17%	576
August	1st to 10th	Day	17% 3 12% 26% 29% 14%	526
	11th to 20th	Day	11% 3 9% 27% 30% 19%	519
	21st to end	Day	9% 2 9% 28% 31% 21%	583
September	1st to 10th	Day	14% 1 13% 27% 28% 18%	530
	11th to 20th	Day	16% 4 10% 26% 28% 16%	530
	21st to end	Day	28% 3 18% 30% 16% 6%	530
October	1st to 10th	Day	17% 4 19% 24% 24% 12%	530
	11th to 20th	Day	15% 7% 25% 27% 22% 5%	530
	21st to end	Day	13% 11% 27% 30% 14% 5%	583
November	1st to 10th	Day	17% 7% 31% 26% 15% 3	535
	11th to 20th	Day	16% 13% 32% 24% 13% 1	476
	21st to end	Day	13% 16% 29% 26% 13% 2	289
December	1st to 10th	Day	24% 12% 40% 18% 5% 1	220
	11th to 20th	Day	19% 11% 37% 25% 7% 1	289
	21st to end	Day	21% 16% 33% 18% 10% 1	363
January	1st to 10th	Night	20% 14% 39% 22% 4	840
	11th to 20th	Night	19% 14% 39% 24% 4	840
	21st to end	Night	18% 12% 43% 24% 2	924
February	1st to 10th	Night	20% 13% 38% 25% 3	801
	11th to 20th	Night	26% 16% 39% 18% 1	783
	21st to end	Night	18% 14% 40% 25% 3	660
March	1st to 10th	Night	17% 15% 36% 28% 5%	800
	11th to 20th	Night	20% 14% 35% 24% 7%	800
	21st to end	Night	18% 11% 41% 26% 5%	880
April	1st to 10th	Night	16% 17% 33% 27% 6%	800
	11th to 20th	Night	15% 11% 35% 29% 10% 1	791
	21st to end	Night	14% 6% 34% 38% 8%	785
May	1st to 10th	Night	11% 10% 32% 37% 10%	600
	11th to 20th	Night	17% 4 25% 34% 19% 1	591
	21st to end	Night	15% 2 15% 38% 27% 4	650
June	1st to 10th	Night	11% 2 17% 42% 26% 2	600
	11th to 20th	Night	10% 2 15% 38% 30% 4	600
	21st to end	Night	8% 2 14% 40% 33% 4	600
July	1st to 10th	Night	11% 1 8% 36% 40% 5%	585
	11th to 20th	Night	8% 2 6% 36% 41% 7%	582
	21st to end	Night	7% 2 9% 39% 37% 6%	657
August	1st to 10th	Night	15% 2 7% 40% 31% 5%	597
	11th to 20th	Night	11% 2 9% 34% 37% 6%	613
	21st to end	Night	10% 3 8% 36% 36% 7%	880
September	1st to 10th	Night	13% 2 8% 36% 35% 6%	800
	11th to 20th	Night	18% 2 10% 32% 33% 5%	800
	21st to end	Night	23% 4 15% 33% 22% 2	800
October	1st to 10th	Night	18% 3 17% 30% 26% 6%	800
	11th to 20th	Night	17% 6% 25% 32% 20% 2	800
	21st to end	Night	14% 8% 26% 34% 16% 2	880
November	1st to 10th	Night	17% 7% 25% 33% 15% 2	820
	11th to 20th	Night	15% 11% 30% 34% 10%	840
	21st to end	Night	14% 9% 33% 32% 11% 1	840
December	1st to 10th	Night	20% 11% 35% 28% 6%	840
	11th to 20th	Night	19% 9% 36% 31% 5%	840
	21st to end	Night	22% 11% 28% 33% 5%	924

Page generated at 2026-01-29 01:21:44. Version ac07

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