Hobbs State Park
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Hobbs State Park clear sky chart from 2005-11-06 to 2026-07-31.

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	11% 7% 3 6% 4 4 4 3 5% 7% 45%	137533
	Night	12% 7% 2 6% 4 4 4 3 5% 7% 48%	135774
Transparency	Day	37% 6% 11% 24% 18% 4	141144
	Night	35% 5% 10% 25% 20% 5%	140243
Seeing	Day	17% 12% 28% 25% 15% 4	17851
	Night	16% 12% 30% 28% 13% 1	27612

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% 12% 3 5% 5% 4 3 2 4 5% 43%	5289
	11th to 20th	Day	6% 8% 4 7% 4 3 3 3 4 5% 53%	5310
	21st to end	Day	17% 9% 3 5% 3 3 3 2 3 4 47%	5812
February	1st to 10th	Day	17% 11% 3 6% 5% 4 4 2 3 6% 39%	1890
	11th to 20th	Day	15% 10% 3 7% 4 3 3 3 4 6% 42%	1844
	21st to end	Day	14% 10% 4 6% 4 3 4 3 4 5% 43%	1883
March	1st to 10th	Day	13% 9% 2 5% 3 3 4 4 5% 6% 47%	5046
	11th to 20th	Day	9% 6% 2 5% 3 3 4 3 5% 6% 54%	5090
	21st to end	Day	13% 9% 3 7% 5% 5% 5% 3 5% 7% 37%	5583
April	1st to 10th	Day	13% 7% 2 6% 5% 4 4 3 5% 7% 44%	2441
	11th to 20th	Day	16% 7% 3 7% 5% 3 5% 3 4 6% 40%	2494
	21st to end	Day	17% 9% 3 7% 5% 4 4 3 4 5% 38%	2520
May	1st to 10th	Day	14% 7% 2 7% 5% 5% 4 4 6% 6% 39%	7556
	11th to 20th	Day	10% 7% 3 7% 5% 5% 5% 4 6% 6% 41%	7627
	21st to end	Day	18% 8% 3 8% 5% 5% 5% 4 6% 7% 32%	8392
June	1st to 10th	Day	7% 5% 2 5% 5% 4 6% 5% 7% 10% 43%	2730
	11th to 20th	Day	7% 5% 2 5% 5% 6% 5% 4 7% 9% 45%	2730
	21st to end	Day	4 3 1 4 4 6% 6% 4 6% 10% 52%	2730
July	1st to 10th	Day	8% 4 2 6% 5% 5% 5% 5% 8% 11% 42%	6030
	11th to 20th	Day	5% 5% 3 5% 4 5% 5% 4 7% 11% 47%	6030
	21st to end	Day	4 4 1 5% 4 5% 6% 5% 8% 11% 48%	6553
August	1st to 10th	Day	4 4 2 4 3 4 4 3 6% 8% 58%	4234
	11th to 20th	Day	9% 5% 2 5% 4 4 5% 4 6% 8% 47%	4087
	21st to end	Day	5% 4 2 5% 4 4 4 4 6% 9% 53%	4312
September	1st to 10th	Day	11% 5% 2 5% 3 4 3 3 5% 6% 53%	2400
	11th to 20th	Day	10% 5% 3 6% 4 4 5% 4 6% 8% 45%	2260
	21st to end	Day	7% 5% 2 5% 3 4 4 3 5% 8% 54%	2157
October	1st to 10th	Day	9% 4 2 5% 4 2 4 3 5% 7% 56%	2000
	11th to 20th	Day	12% 5% 2 5% 3 2 2 2 4 6% 58%	2000
	21st to end	Day	18% 7% 3 5% 3 3 3 2 3 5% 49%	2200
November	1st to 10th	Day	12% 7% 2 4 2 3 3 2 3 6% 56%	2058
	11th to 20th	Day	12% 7% 2 5% 3 3 4 3 5% 5% 51%	2063
	21st to end	Day	17% 9% 2 4 3 2 3 3 4 6% 47%	1723
December	1st to 10th	Day	12% 9% 3 5% 3 3 3 3 3 4 53%	2690
	11th to 20th	Day	12% 10% 3 6% 4 3 3 2 3 5% 48%	3182
	21st to end	Day	18% 18% 5% 7% 4 3 3 3 3 4 31%	4587
January	1st to 10th	Night	12% 9% 4 8% 5% 4 3 3 4 5% 42%	7634
	11th to 20th	Night	8% 6% 2 7% 4 4 5% 2 3 5% 54%	7680
	21st to end	Night	18% 10% 3 6% 4 4 3 2 3 4 42%	8402
February	1st to 10th	Night	16% 10% 3 7% 3 3 3 3 4 7% 41%	2730
	11th to 20th	Night	15% 9% 3 7% 4 3 3 2 4 5% 45%	2662
	21st to end	Night	13% 9% 3 6% 4 3 3 3 5% 6% 47%	1940
March	1st to 10th	Night	16% 10% 2 6% 4 3 3 3 4 4 45%	5029
	11th to 20th	Night	9% 8% 2 5% 3 3 3 3 5% 6% 52%	5090
	21st to end	Night	11% 7% 3 7% 4 4 4 4 5% 8% 44%	5588
April	1st to 10th	Night	12% 7% 2 4 3 4 3 3 4 7% 50%	2178
	11th to 20th	Night	15% 6% 2 5% 3 3 4 3 5% 7% 47%	2075
	21st to end	Night	17% 7% 2 6% 3 3 4 3 5% 5% 44%	2100
May	1st to 10th	Night	12% 8% 2 6% 4 4 4 4 5% 7% 44%	5308
	11th to 20th	Night	11% 6% 2 6% 5% 5% 5% 4 6% 9% 41%	5265
	21st to end	Night	18% 9% 3 7% 4 4 4 3 5% 8% 35%	5793
June	1st to 10th	Night	7% 4 2 4 3 4 4 4 6% 9% 53%	1890
	11th to 20th	Night	5% 3 2 4 3 3 4 4 7% 11% 52%	1890
	21st to end	Night	2 3 1 3 3 3 4 4 6% 9% 62%	1890
July	1st to 10th	Night	7% 5% 2 5% 4 4 4 5% 7% 11% 46%	4168
	11th to 20th	Night	4 2 1 4 3 3 4 3 6% 9% 61%	4167
	21st to end	Night	4 3 2 4 4 3 4 4 6% 9% 57%	4539
August	1st to 10th	Night	2 2 1 3 4 4 4 4 7% 10% 58%	2926
	11th to 20th	Night	7% 4 1 6% 3 5% 5% 4 6% 8% 51%	2966
	21st to end	Night	3 3 1 3 3 4 3 4 7% 8% 61%	3586
September	1st to 10th	Night	8% 5% 2 4 3 3 4 3 5% 7% 57%	2000
	11th to 20th	Night	9% 4 2 6% 4 4 4 3 5% 7% 52%	2135
	21st to end	Night	7% 5% 2 5% 4 4 3 3 5% 6% 55%	2221
October	1st to 10th	Night	6% 3 1 3 3 3 3 3 5% 8% 62%	2400
	11th to 20th	Night	12% 4 1 3 3 3 3 3 5% 6% 57%	2400
	21st to end	Night	17% 7% 2 5% 2 3 3 2 3 4 52%	2640
November	1st to 10th	Night	12% 5% 1 4 3 2 3 2 3 6% 59%	2460
	11th to 20th	Night	11% 6% 1 4 2 3 4 3 4 5% 56%	2552
	21st to end	Night	15% 8% 2 5% 4 2 3 3 3 6% 49%	2890
December	1st to 10th	Night	11% 10% 3 6% 3 2 2 2 4 6% 51%	4720
	11th to 20th	Night	17% 8% 3 6% 3 3 3 2 3 4 48%	5227
	21st to end	Night	20% 15% 5% 8% 4 3 3 2 3 4 34%	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	43% 3 8% 25% 19% 2	5290
	11th to 20th	Day	33% 3 8% 26% 25% 5%	5310
	21st to end	Day	42% 3 5% 22% 21% 7%	5812
February	1st to 10th	Day	48% 4 9% 22% 13% 4	1890
	11th to 20th	Day	45% 3 10% 22% 18% 4	1853
	21st to end	Day	44% 3 7% 20% 18% 8%	1883
March	1st to 10th	Day	38% 5% 7% 20% 16% 15%	5046
	11th to 20th	Day	31% 4 8% 19% 25% 12%	5090
	21st to end	Day	45% 6% 10% 28% 11% 1	5585
April	1st to 10th	Day	40% 4 11% 23% 19% 3	2441
	11th to 20th	Day	45% 5% 11% 18% 17% 4	2494
	21st to end	Day	49% 5% 9% 22% 13% 2	2520
May	1st to 10th	Day	44% 7% 9% 21% 18% 2	7594
	11th to 20th	Day	41% 7% 10% 21% 17% 2	7631
	21st to end	Day	49% 8% 11% 16% 14% 1	8405
June	1st to 10th	Day	34% 8% 16% 27% 14% 1	2730
	11th to 20th	Day	33% 6% 14% 28% 16% 2	2730
	21st to end	Day	27% 7% 16% 29% 17% 4	2730
July	1st to 10th	Day	32% 9% 18% 26% 14% 2	5966
	11th to 20th	Day	29% 8% 16% 32% 15% 1	5961
	21st to end	Day	27% 10% 19% 33% 12%	6371
August	1st to 10th	Day	23% 6% 16% 30% 20% 4	4220
	11th to 20th	Day	34% 7% 16% 29% 14% 1	4126
	21st to end	Day	27% 6% 15% 35% 14% 3	4311
September	1st to 10th	Day	32% 5% 11% 27% 17% 9%	2400
	11th to 20th	Day	35% 5% 12% 23% 22% 3	2260
	21st to end	Day	30% 5% 9% 25% 27% 3	2157
October	1st to 10th	Day	17% 3 6% 17% 39% 18%	3260
	11th to 20th	Day	19% 3 5% 20% 37% 16%	3240
	21st to end	Day	29% 3 8% 31% 24% 5%	3538
November	1st to 10th	Day	31% 3 7% 28% 24% 7%	2058
	11th to 20th	Day	35% 3 7% 24% 22% 10%	2063
	21st to end	Day	40% 3 9% 21% 24% 3	1723
December	1st to 10th	Day	37% 3 8% 29% 22% 2	2690
	11th to 20th	Day	40% 3 5% 26% 23% 3	3179
	21st to end	Day	55% 5% 7% 20% 12% 2	4587
January	1st to 10th	Night	43% 4 9% 26% 15% 3	7635
	11th to 20th	Night	31% 4 9% 19% 33% 5%	7680
	21st to end	Night	47% 3 7% 17% 22% 4	8402
February	1st to 10th	Night	44% 3 10% 24% 15% 4	2730
	11th to 20th	Night	43% 3 8% 25% 18% 4	2663
	21st to end	Night	39% 3 8% 19% 23% 8%	1940
March	1st to 10th	Night	43% 4 6% 17% 19% 10%	5029
	11th to 20th	Night	33% 4 8% 23% 21% 11%	5090
	21st to end	Night	38% 6% 12% 28% 15% 2	5588
April	1st to 10th	Night	35% 4 11% 26% 19% 6%	2178
	11th to 20th	Night	35% 5% 10% 23% 22% 5%	2075
	21st to end	Night	41% 6% 10% 25% 16% 2	2100
May	1st to 10th	Night	40% 6% 12% 25% 15% 2	5335
	11th to 20th	Night	38% 8% 15% 21% 16% 3	5266
	21st to end	Night	47% 8% 14% 19% 10% 2	5805
June	1st to 10th	Night	26% 7% 15% 31% 17% 3	1890
	11th to 20th	Night	23% 7% 16% 31% 20% 3	1890
	21st to end	Night	19% 6% 16% 32% 22% 5%	1890
July	1st to 10th	Night	29% 9% 18% 26% 14% 3	4125
	11th to 20th	Night	20% 7% 16% 38% 18% 1	4116
	21st to end	Night	22% 7% 17% 36% 17% 1	4410
August	1st to 10th	Night	19% 6% 16% 35% 22% 1	2916
	11th to 20th	Night	29% 7% 18% 27% 17% 2	2993
	21st to end	Night	19% 6% 14% 36% 22% 3	3586
September	1st to 10th	Night	26% 5% 11% 30% 20% 9%	2000
	11th to 20th	Night	31% 5% 11% 23% 24% 5%	2135
	21st to end	Night	29% 4 8% 24% 30% 5%	2221
October	1st to 10th	Night	13% 3 8% 15% 38% 24%	3920
	11th to 20th	Night	20% 3 5% 19% 32% 21%	3899
	21st to end	Night	29% 3 7% 30% 23% 7%	4252
November	1st to 10th	Night	29% 3 8% 25% 26% 8%	2460
	11th to 20th	Night	30% 3 7% 25% 26% 8%	2552
	21st to end	Night	39% 3 7% 22% 24% 4	2890
December	1st to 10th	Night	36% 3 8% 34% 17% 2	4720
	11th to 20th	Night	42% 3 5% 22% 23% 5%	5229
	21st to end	Night	54% 4 8% 21% 10% 3	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	26% 19% 38% 13% 3	330
	11th to 20th	Day	25% 23% 38% 12% 1	330
	21st to end	Day	24% 21% 40% 12% 4	363
February	1st to 10th	Day	32% 23% 33% 11% 2	330
	11th to 20th	Day	28% 28% 33% 11% 1	330
	21st to end	Day	32% 23% 34% 10% 2	273
March	1st to 10th	Day	27% 24% 33% 13% 3	330
	11th to 20th	Day	31% 21% 34% 13% 1	330
	21st to end	Day	30% 21% 39% 7% 2	363
April	1st to 10th	Day	26% 23% 30% 13% 6% 1	461
	11th to 20th	Day	27% 18% 35% 14% 4	532
	21st to end	Day	28% 19% 29% 19% 5%	540
May	1st to 10th	Day	20% 16% 38% 20% 6%	731
	11th to 20th	Day	17% 11% 33% 24% 12% 2	775
	21st to end	Day	14% 11% 35% 23% 13% 4	844
June	1st to 10th	Day	11% 5% 24% 34% 20% 6%	780
	11th to 20th	Day	8% 4 27% 35% 20% 5%	780
	21st to end	Day	4 5% 32% 34% 21% 4	780
July	1st to 10th	Day	8% 4 17% 35% 28% 8%	771
	11th to 20th	Day	5% 2 17% 39% 29% 8%	768
	21st to end	Day	8% 2 12% 35% 33% 10%	845
August	1st to 10th	Day	9% 3 14% 41% 29% 4	726
	11th to 20th	Day	13% 2 10% 33% 33% 9%	670
	21st to end	Day	10% 3 11% 34% 30% 13%	583
September	1st to 10th	Day	12% 2 13% 35% 31% 8%	530
	11th to 20th	Day	7% 3 19% 41% 24% 7%	390
	21st to end	Day	12% 5% 26% 29% 23% 5%	330
October	1st to 10th	Day	10% 7% 28% 31% 18% 6%	330
	11th to 20th	Day	14% 11% 42% 21% 11% 2	330
	21st to end	Day	30% 15% 33% 18% 5%	363
November	1st to 10th	Day	17% 18% 40% 16% 8% 2	330
	11th to 20th	Day	18% 17% 41% 14% 10% 1	330
	21st to end	Day	27% 17% 32% 19% 5% 1	330
December	1st to 10th	Day	22% 22% 35% 15% 6% 1	330
	11th to 20th	Day	22% 24% 36% 14% 5% 1	330
	21st to end	Day	25% 24% 36% 13% 2	363
January	1st to 10th	Night	20% 18% 35% 23% 4	1050
	11th to 20th	Night	20% 23% 36% 17% 3	1050
	21st to end	Night	19% 22% 35% 21% 3	1155
February	1st to 10th	Night	22% 19% 37% 19% 3	1050
	11th to 20th	Night	22% 21% 38% 17% 2	1028
	21st to end	Night	21% 21% 36% 20% 1	556
March	1st to 10th	Night	24% 15% 36% 23% 3	630
	11th to 20th	Night	24% 16% 34% 23% 3	630
	21st to end	Night	20% 15% 42% 17% 5%	693
April	1st to 10th	Night	18% 18% 35% 25% 4	630
	11th to 20th	Night	19% 15% 37% 22% 6%	623
	21st to end	Night	20% 15% 37% 21% 7%	630
May	1st to 10th	Night	15% 7% 37% 32% 8%	630
	11th to 20th	Night	15% 9% 30% 32% 13% 1	621
	21st to end	Night	14% 6% 29% 31% 16% 3	683
June	1st to 10th	Night	8% 4 19% 39% 28% 1	630
	11th to 20th	Night	6% 3 27% 41% 21% 2	630
	21st to end	Night	3 2 23% 45% 24% 3	630
July	1st to 10th	Night	6% 2 13% 38% 38% 4	615
	11th to 20th	Night	5% 1 11% 45% 33% 5%	612
	21st to end	Night	5% 2 8% 43% 36% 6%	687
August	1st to 10th	Night	5% 1 12% 44% 35% 4	597
	11th to 20th	Night	7% 1 12% 41% 34% 4	594
	21st to end	Night	6% 2 13% 41% 33% 5%	660
September	1st to 10th	Night	10% 2 13% 41% 31% 3	600
	11th to 20th	Night	11% 2 15% 39% 28% 5%	600
	21st to end	Night	9% 5% 19% 38% 25% 4	621
October	1st to 10th	Night	7% 4 25% 37% 23% 4	800
	11th to 20th	Night	14% 9% 35% 31% 12%	800
	21st to end	Night	21% 12% 33% 23% 10%	880
November	1st to 10th	Night	15% 11% 36% 27% 10%	820
	11th to 20th	Night	16% 14% 33% 30% 7%	872
	21st to end	Night	22% 16% 33% 23% 7%	1050
December	1st to 10th	Night	20% 15% 39% 22% 5%	1050
	11th to 20th	Night	24% 15% 33% 24% 4	1050
	21st to end	Night	22% 18% 36% 20% 4	1155

Page generated at 2026-07-28 02:25:21. Version ac07

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