Miramichi (Bay du Vin)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Miramichi (Bay du Vin) clear sky chart from 2005-11-06 to 2026-06-16.

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	18% 9% 3 8% 5% 4 5% 4 5% 7% 33%	137825
	Night	18% 11% 3 7% 4 4 4 3 5% 6% 34%	134426
Transparency	Day	50% 6% 12% 20% 11% 1	141329
	Night	51% 5% 12% 21% 11% 1	139011
Seeing	Day	24% 15% 32% 20% 7% 1	18737
	Night	25% 14% 33% 22% 7% 1	26385

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	14% 17% 5% 10% 6% 4 4 3 5% 4 27%	4093
	11th to 20th	Day	14% 14% 7% 12% 5% 5% 4 3 4 5% 26%	4172
	21st to end	Day	5% 9% 4 7% 5% 4 5% 5% 7% 8% 40%	5642
February	1st to 10th	Day	12% 12% 4 9% 5% 4 4 4 7% 4 34%	1890
	11th to 20th	Day	14% 13% 4 9% 5% 5% 5% 4 5% 5% 31%	1843
	21st to end	Day	10% 12% 4 7% 7% 6% 5% 3 4 6% 34%	1583
March	1st to 10th	Day	20% 13% 4 9% 4 4 4 3 4 7% 28%	4938
	11th to 20th	Day	16% 15% 4 10% 5% 5% 5% 3 4 6% 26%	5090
	21st to end	Day	25% 13% 3 8% 4 4 4 3 5% 6% 25%	5587
April	1st to 10th	Day	20% 11% 4 7% 6% 4 4 3 4 6% 30%	2475
	11th to 20th	Day	22% 9% 2 6% 4 4 4 3 5% 6% 34%	2697
	21st to end	Day	25% 10% 3 6% 5% 3 4 3 4 6% 31%	2730
May	1st to 10th	Day	26% 11% 3 7% 5% 5% 5% 4 5% 5% 25%	7872
	11th to 20th	Day	21% 9% 3 7% 5% 4 4 3 5% 7% 33%	8220
	21st to end	Day	24% 7% 2 8% 5% 4 4 3 5% 7% 30%	9293
June	1st to 10th	Day	26% 8% 3 6% 4 4 4 4 5% 7% 29%	3150
	11th to 20th	Day	20% 7% 2 7% 5% 5% 5% 3 6% 8% 33%	3075
	21st to end	Day	26% 8% 3 6% 6% 5% 4 3 6% 7% 27%	3000
July	1st to 10th	Day	14% 7% 3 9% 6% 6% 6% 5% 7% 9% 30%	6820
	11th to 20th	Day	12% 5% 2 7% 5% 4 5% 4 6% 8% 40%	6820
	21st to end	Day	12% 5% 2 6% 5% 5% 5% 4 7% 8% 40%	6915
August	1st to 10th	Day	15% 7% 3 7% 5% 5% 5% 4 6% 8% 34%	4235
	11th to 20th	Day	13% 6% 2 7% 5% 5% 6% 5% 6% 8% 38%	4175
	21st to end	Day	15% 5% 2 4 3 4 4 4 5% 8% 46%	4624
September	1st to 10th	Day	15% 5% 2 6% 4 4 4 3 5% 7% 43%	2400
	11th to 20th	Day	16% 7% 2 6% 4 4 3 3 3 5% 46%	2262
	21st to end	Day	18% 6% 2 5% 4 4 4 4 4 6% 43%	2177
October	1st to 10th	Day	15% 7% 2 6% 5% 4 4 4 4 6% 43%	2000
	11th to 20th	Day	20% 9% 3 7% 4 4 4 3 5% 5% 37%	2000
	21st to end	Day	23% 7% 2 7% 5% 4 5% 3 5% 6% 33%	2112
November	1st to 10th	Day	20% 9% 2 7% 6% 4 4 4 5% 7% 33%	1663
	11th to 20th	Day	21% 11% 3 6% 4 4 4 3 5% 6% 32%	1680
	21st to end	Day	20% 12% 3 8% 5% 3 4 4 4 5% 31%	1680
December	1st to 10th	Day	17% 12% 4 8% 4 4 4 4 5% 6% 34%	2671
	11th to 20th	Day	18% 12% 4 8% 5% 3 3 3 4 6% 35%	2688
	21st to end	Day	15% 12% 6% 9% 5% 4 4 3 3 4 35%	3553
January	1st to 10th	Night	15% 16% 4 9% 5% 4 4 3 5% 5% 30%	8831
	11th to 20th	Night	16% 16% 5% 9% 4 4 4 3 5% 5% 26%	8734
	21st to end	Night	5% 11% 4 8% 5% 4 4 4 5% 7% 43%	8524
February	1st to 10th	Night	13% 13% 3 8% 5% 5% 4 4 6% 6% 33%	2730
	11th to 20th	Night	16% 15% 4 8% 5% 5% 5% 3 4 5% 30%	2663
	21st to end	Night	13% 14% 4 7% 5% 4 4 4 5% 6% 35%	2218
March	1st to 10th	Night	21% 13% 4 10% 6% 5% 4 3 4 4 26%	5121
	11th to 20th	Night	22% 14% 4 9% 5% 4 4 3 5% 5% 24%	5089
	21st to end	Night	29% 11% 4 7% 4 4 4 2 4 5% 27%	5587
April	1st to 10th	Night	26% 11% 3 7% 5% 4 3 4 4 5% 28%	2144
	11th to 20th	Night	23% 11% 3 6% 3 3 3 3 6% 6% 32%	1871
	21st to end	Night	22% 11% 4 9% 3 4 4 3 4 5% 32%	1890
May	1st to 10th	Night	26% 13% 3 7% 4 4 4 4 4 6% 25%	5038
	11th to 20th	Night	23% 8% 3 8% 4 4 4 3 5% 5% 33%	4670
	21st to end	Night	20% 9% 3 7% 5% 4 4 3 5% 6% 33%	4970
June	1st to 10th	Night	26% 8% 3 7% 4 4 3 3 5% 5% 31%	1470
	11th to 20th	Night	20% 8% 2 5% 5% 4 5% 4 5% 6% 35%	1435
	21st to end	Night	27% 10% 3 6% 5% 5% 4 3 5% 5% 28%	1400
July	1st to 10th	Night	16% 7% 3 8% 5% 5% 6% 4 7% 7% 33%	3160
	11th to 20th	Night	12% 7% 3 7% 5% 5% 5% 4 6% 8% 38%	3160
	21st to end	Night	9% 6% 2 6% 4 5% 6% 5% 7% 9% 41%	3901
August	1st to 10th	Night	17% 7% 3 7% 5% 6% 5% 4 6% 7% 31%	2915
	11th to 20th	Night	11% 7% 3 8% 5% 5% 5% 4 6% 8% 38%	2872
	21st to end	Night	14% 4 2 6% 4 4 4 3 5% 8% 46%	3273
September	1st to 10th	Night	17% 5% 2 5% 3 4 3 3 4 8% 45%	2000
	11th to 20th	Night	14% 6% 2 5% 3 3 4 3 5% 7% 48%	2135
	21st to end	Night	18% 5% 2 5% 4 3 4 3 5% 6% 44%	2222
October	1st to 10th	Night	18% 6% 2 5% 3 4 5% 4 4 6% 43%	2400
	11th to 20th	Night	17% 10% 2 6% 4 4 4 3 4 6% 40%	2400
	21st to end	Night	22% 8% 2 6% 5% 4 3 3 5% 6% 35%	2725
November	1st to 10th	Night	20% 9% 3 7% 4 4 4 3 5% 6% 35%	2853
	11th to 20th	Night	22% 10% 3 7% 5% 4 4 3 5% 6% 31%	2940
	21st to end	Night	22% 11% 3 7% 4 4 4 3 5% 6% 31%	2940
December	1st to 10th	Night	15% 11% 4 6% 4 4 4 3 5% 6% 38%	4737
	11th to 20th	Night	19% 11% 3 6% 4 3 3 3 5% 6% 37%	5741
	21st to end	Night	19% 12% 5% 9% 4 4 3 3 4 5% 31%	7667

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	60% 5% 10% 13% 13%	4094
	11th to 20th	Day	59% 5% 12% 12% 12% 1	4198
	21st to end	Day	40% 5% 12% 22% 20% 1	5642
February	1st to 10th	Day	51% 4 11% 19% 13% 2	1890
	11th to 20th	Day	54% 5% 9% 20% 10% 1	1851
	21st to end	Day	51% 5% 8% 21% 13% 2	1583
March	1st to 10th	Day	59% 5% 9% 14% 11% 2	4942
	11th to 20th	Day	59% 6% 13% 13% 6% 2	5090
	21st to end	Day	61% 4 5% 18% 11% 2	5587
April	1st to 10th	Day	56% 4 7% 17% 12% 3	2475
	11th to 20th	Day	51% 5% 9% 22% 11% 1	2697
	21st to end	Day	54% 5% 9% 15% 13% 4	2730
May	1st to 10th	Day	61% 5% 9% 15% 10%	7884
	11th to 20th	Day	51% 7% 13% 21% 8% 1	8224
	21st to end	Day	52% 7% 10% 17% 13% 1	9294
June	1st to 10th	Day	55% 6% 11% 19% 9% 1	3150
	11th to 20th	Day	48% 6% 12% 20% 11% 1	3075
	21st to end	Day	57% 7% 11% 17% 8% 1	3000
July	1st to 10th	Day	49% 7% 17% 19% 8%	6745
	11th to 20th	Day	40% 6% 16% 29% 9%	6739
	21st to end	Day	39% 7% 17% 30% 7%	6717
August	1st to 10th	Day	47% 7% 15% 22% 9%	4222
	11th to 20th	Day	42% 8% 15% 25% 9%	4214
	21st to end	Day	36% 5% 15% 26% 17%	4624
September	1st to 10th	Day	39% 7% 14% 26% 14%	2400
	11th to 20th	Day	41% 5% 12% 26% 15% 1	2262
	21st to end	Day	42% 6% 10% 27% 14% 1	2177
October	1st to 10th	Day	42% 6% 14% 27% 10% 1	3260
	11th to 20th	Day	48% 6% 11% 25% 10%	3240
	21st to end	Day	41% 5% 17% 21% 15% 1	3388
November	1st to 10th	Day	52% 5% 11% 22% 10% 1	1663
	11th to 20th	Day	53% 5% 13% 16% 12% 1	1680
	21st to end	Day	55% 7% 14% 16% 8%	1680
December	1st to 10th	Day	50% 5% 14% 22% 8%	2671
	11th to 20th	Day	53% 4 11% 18% 11% 2	2688
	21st to end	Day	55% 5% 10% 18% 11% 2	3553
January	1st to 10th	Night	55% 5% 12% 22% 7%	8831
	11th to 20th	Night	59% 6% 10% 15% 9% 1	8783
	21st to end	Night	41% 4 11% 23% 18% 3	8524
February	1st to 10th	Night	50% 5% 12% 17% 13% 2	2730
	11th to 20th	Night	56% 5% 9% 17% 11% 2	2666
	21st to end	Night	50% 6% 7% 21% 14% 2	2218
March	1st to 10th	Night	62% 4 6% 12% 13% 3	5130
	11th to 20th	Night	62% 5% 11% 12% 9% 1	5090
	21st to end	Night	61% 3 5% 16% 13% 2	5587
April	1st to 10th	Night	58% 4 8% 16% 12% 3	2144
	11th to 20th	Night	52% 5% 9% 21% 12% 2	1871
	21st to end	Night	55% 5% 8% 14% 15% 3	1890
May	1st to 10th	Night	60% 5% 9% 15% 10% 1	5044
	11th to 20th	Night	51% 6% 9% 23% 9% 1	4671
	21st to end	Night	51% 7% 12% 16% 13% 1	4971
June	1st to 10th	Night	54% 6% 11% 20% 9% 1	1470
	11th to 20th	Night	48% 6% 11% 24% 9% 2	1435
	21st to end	Night	58% 5% 11% 17% 8% 1	1400
July	1st to 10th	Night	48% 7% 17% 17% 11%	3125
	11th to 20th	Night	43% 6% 19% 28% 4	3118
	21st to end	Night	37% 8% 21% 24% 9%	3785
August	1st to 10th	Night	50% 9% 13% 20% 8%	2903
	11th to 20th	Night	41% 8% 19% 24% 8%	2899
	21st to end	Night	37% 7% 16% 25% 14% 1	3272
September	1st to 10th	Night	38% 6% 12% 32% 12% 1	2000
	11th to 20th	Night	36% 5% 15% 29% 14% 1	2135
	21st to end	Night	39% 6% 11% 28% 14% 1	2222
October	1st to 10th	Night	46% 5% 13% 27% 9% 1	3920
	11th to 20th	Night	41% 6% 12% 31% 10%	3899
	21st to end	Night	43% 4 17% 24% 13%	4399
November	1st to 10th	Night	51% 4 12% 21% 10% 1	2853
	11th to 20th	Night	55% 5% 11% 19% 10% 1	2940
	21st to end	Night	54% 6% 13% 18% 8%	2940
December	1st to 10th	Night	45% 4 13% 27% 10%	4737
	11th to 20th	Night	48% 4 10% 23% 13% 1	5742
	21st to end	Night	56% 4 11% 19% 9% 1	7667

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	31% 15% 37% 14% 3	220
	11th to 20th	Day	33% 19% 25% 15% 8% 1	220
	21st to end	Day	16% 20% 38% 21% 5%	425
February	1st to 10th	Day	23% 17% 34% 18% 5% 3	430
	11th to 20th	Day	22% 23% 35% 13% 5% 1	426
	21st to end	Day	21% 17% 38% 18% 5% 1	369
March	1st to 10th	Day	28% 20% 34% 15% 3 1	540
	11th to 20th	Day	27% 20% 28% 18% 5% 1	540
	21st to end	Day	32% 17% 32% 13% 4 1	594
April	1st to 10th	Day	29% 23% 34% 11% 3 1	540
	11th to 20th	Day	29% 21% 30% 16% 3 1	532
	21st to end	Day	31% 15% 30% 18% 5% 1	540
May	1st to 10th	Day	30% 18% 28% 18% 5% 1	622
	11th to 20th	Day	25% 14% 31% 19% 9% 2	774
	21st to end	Day	27% 16% 32% 19% 5% 1	845
June	1st to 10th	Day	30% 12% 31% 16% 9% 2	780
	11th to 20th	Day	23% 14% 31% 24% 7% 1	755
	21st to end	Day	28% 12% 29% 24% 7% 1	730
July	1st to 10th	Day	20% 9% 38% 21% 12% 1	720
	11th to 20th	Day	14% 7% 40% 27% 11% 1	718
	21st to end	Day	16% 7% 36% 29% 10% 2	740
August	1st to 10th	Day	14% 7% 35% 30% 11% 3	526
	11th to 20th	Day	15% 9% 27% 32% 15% 2	519
	21st to end	Day	16% 11% 30% 29% 11% 3	583
September	1st to 10th	Day	15% 13% 34% 25% 11% 2	530
	11th to 20th	Day	21% 13% 31% 24% 8% 3	530
	21st to end	Day	18% 17% 34% 21% 8% 3	516
October	1st to 10th	Day	19% 12% 32% 23% 12% 2	420
	11th to 20th	Day	25% 17% 28% 20% 9% 2	420
	21st to end	Day	27% 20% 31% 16% 5% 2	462
November	1st to 10th	Day	25% 21% 33% 15% 4 1	425
	11th to 20th	Day	29% 19% 30% 15% 6% 1	430
	21st to end	Day	33% 20% 30% 14% 3 1	430
December	1st to 10th	Day	32% 15% 33% 16% 4 1	424
	11th to 20th	Day	29% 23% 35% 11% 2	220
	21st to end	Day	25% 22% 32% 14% 6%	242
January	1st to 10th	Night	25% 17% 34% 19% 4	950
	11th to 20th	Night	25% 17% 33% 20% 5%	933
	21st to end	Night	18% 19% 37% 21% 5%	924
February	1st to 10th	Night	21% 16% 37% 19% 7% 1	840
	11th to 20th	Night	26% 18% 35% 15% 4 1	823
	21st to end	Night	21% 14% 39% 20% 6%	692
March	1st to 10th	Night	27% 14% 34% 22% 3	840
	11th to 20th	Night	26% 15% 32% 20% 6% 1	840
	21st to end	Night	25% 15% 34% 21% 5% 1	924
April	1st to 10th	Night	32% 15% 28% 22% 3	674
	11th to 20th	Night	31% 10% 34% 17% 8%	624
	21st to end	Night	31% 12% 27% 23% 8%	630
May	1st to 10th	Night	32% 11% 27% 23% 7%	630
	11th to 20th	Night	26% 8% 31% 25% 9% 1	622
	21st to end	Night	23% 12% 34% 25% 6%	622
June	1st to 10th	Night	31% 6% 27% 28% 8%	420
	11th to 20th	Night	24% 5% 29% 32% 10%	410
	21st to end	Night	30% 7% 27% 26% 10% 1	400
July	1st to 10th	Night	18% 6% 39% 25% 10% 1	390
	11th to 20th	Night	16% 4 33% 37% 10%	388
	21st to end	Night	17% 5% 30% 34% 13% 1	580
August	1st to 10th	Night	20% 3 33% 32% 12%	598
	11th to 20th	Night	16% 6% 27% 38% 12% 1	592
	21st to end	Night	16% 7% 30% 31% 14% 2	660
September	1st to 10th	Night	20% 8% 37% 28% 8% 1	600
	11th to 20th	Night	18% 10% 31% 30% 10% 1	735
	21st to end	Night	20% 10% 36% 24% 10% 1	800
October	1st to 10th	Night	22% 11% 33% 25% 8% 1	800
	11th to 20th	Night	23% 11% 37% 21% 8% 1	800
	21st to end	Night	26% 18% 32% 19% 5%	880
November	1st to 10th	Night	28% 18% 32% 17% 4 1	919
	11th to 20th	Night	28% 19% 31% 16% 5% 1	950
	21st to end	Night	29% 20% 29% 17% 4 1	950
December	1st to 10th	Night	29% 17% 35% 14% 3	950
	11th to 20th	Night	28% 22% 33% 13% 3	950
	21st to end	Night	28% 20% 29% 18% 4 1	1045

Page generated at 2026-06-13 03:31:43. Version ac07

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