Miramichi City (Newcastle)
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Miramichi City (Newcastle) clear sky chart from 2005-11-06 to 2025-02-21.

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% 10% 3 8% 5% 5% 4 4 5% 6% 33%	108328
	Night	18% 10% 3 7% 5% 4 4 3 5% 6% 34%	110345
Transparency	Day	50% 6% 12% 20% 10% 1	111865
	Night	50% 6% 12% 21% 10% 1	114973
Seeing	Day	26% 17% 31% 18% 6% 1	16804
	Night	25% 15% 33% 21% 6%	24666

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% 16% 5% 11% 6% 5% 4 4 5% 5% 26%	3157
	11th to 20th	Day	11% 14% 7% 12% 6% 5% 5% 3 4 5% 28%	3244
	21st to end	Day	6% 8% 3 7% 5% 5% 5% 4 6% 8% 42%	4300
February	1st to 10th	Day	12% 12% 4 8% 6% 5% 5% 4 6% 5% 34%	1800
	11th to 20th	Day	16% 12% 4 9% 7% 5% 4 4 5% 6% 28%	1753
	21st to end	Day	11% 13% 4 9% 6% 5% 6% 4 3 6% 33%	1457
March	1st to 10th	Day	19% 13% 3 7% 4 4 4 3 4 7% 30%	3331
	11th to 20th	Day	17% 18% 4 12% 6% 5% 4 3 4 4 22%	3480
	21st to end	Day	28% 12% 3 7% 4 4 4 3 4 6% 25%	3816
April	1st to 10th	Day	22% 12% 4 8% 5% 5% 3 3 5% 6% 28%	2238
	11th to 20th	Day	21% 10% 3 7% 4 4 3 2 5% 5% 36%	2442
	21st to end	Day	27% 10% 3 6% 4 4 4 2 4 5% 31%	2470
May	1st to 10th	Day	21% 14% 3 9% 6% 4 4 3 4 5% 25%	4192
	11th to 20th	Day	19% 10% 3 8% 4 4 4 3 4 7% 34%	4398
	21st to end	Day	20% 8% 3 7% 5% 5% 6% 5% 6% 8% 28%	4996
June	1st to 10th	Day	27% 9% 3 7% 5% 4 4 3 6% 6% 27%	2850
	11th to 20th	Day	20% 7% 2 7% 5% 4 4 4 5% 7% 34%	2850
	21st to end	Day	28% 8% 3 7% 5% 4 4 3 6% 6% 26%	2850
July	1st to 10th	Day	15% 7% 3 8% 6% 5% 5% 4 6% 8% 31%	4760
	11th to 20th	Day	15% 7% 3 7% 5% 6% 5% 4 6% 8% 34%	4760
	21st to end	Day	13% 6% 3 7% 5% 5% 6% 4 7% 8% 35%	4799
August	1st to 10th	Day	17% 7% 3 7% 5% 5% 6% 5% 7% 7% 32%	4105
	11th to 20th	Day	13% 6% 3 7% 6% 5% 5% 5% 7% 8% 34%	4045
	21st to end	Day	16% 5% 2 5% 3 4 4 3 6% 8% 44%	4510
September	1st to 10th	Day	15% 5% 3 8% 4 4 4 3 5% 8% 39%	2280
	11th to 20th	Day	18% 7% 3 5% 4 3 4 3 4 4 45%	2126
	21st to end	Day	20% 6% 2 5% 4 4 4 3 5% 6% 41%	2084
October	1st to 10th	Day	16% 8% 2 7% 4 4 4 3 4 6% 42%	1900
	11th to 20th	Day	21% 8% 2 7% 4 3 4 4 4 6% 37%	1900
	21st to end	Day	24% 8% 2 7% 4 3 4 4 4 6% 33%	1989
November	1st to 10th	Day	20% 9% 2 6% 5% 4 5% 4 5% 6% 32%	1603
	11th to 20th	Day	21% 11% 3 6% 5% 4 4 3 5% 6% 32%	1600
	21st to end	Day	21% 11% 3 7% 5% 4 4 3 4 6% 31%	1600
December	1st to 10th	Day	17% 12% 3 6% 4 5% 5% 4 5% 6% 33%	2549
	11th to 20th	Day	21% 11% 3 8% 4 4 4 3 4 6% 33%	2618
	21st to end	Day	17% 12% 5% 8% 4 5% 4 3 3 4 36%	3476
January	1st to 10th	Night	12% 14% 5% 10% 6% 5% 5% 4 6% 7% 27%	6808
	11th to 20th	Night	16% 12% 6% 9% 6% 5% 5% 3 4 6% 28%	6651
	21st to end	Night	8% 9% 3 8% 4 4 4 3 6% 7% 45%	6653
February	1st to 10th	Night	13% 13% 4 8% 5% 4 4 4 6% 5% 34%	2600
	11th to 20th	Night	17% 13% 5% 7% 6% 6% 4 3 5% 5% 30%	2533
	21st to end	Night	14% 14% 3 7% 6% 5% 4 4 5% 5% 33%	1995
March	1st to 10th	Night	19% 14% 4 8% 5% 5% 5% 4 4 4 27%	3508
	11th to 20th	Night	25% 15% 4 9% 6% 5% 4 3 4 4 22%	3479
	21st to end	Night	29% 10% 3 7% 4 4 4 2 5% 6% 26%	3816
April	1st to 10th	Night	25% 12% 2 7% 4 3 4 4 4 5% 29%	1936
	11th to 20th	Night	22% 10% 2 7% 4 4 4 3 5% 5% 33%	1688
	21st to end	Night	24% 11% 4 6% 4 4 4 4 3 6% 32%	1710
May	1st to 10th	Night	22% 12% 3 7% 5% 5% 5% 3 6% 6% 27%	2750
	11th to 20th	Night	19% 7% 2 7% 5% 4 3 4 6% 7% 36%	2506
	21st to end	Night	16% 9% 3 8% 5% 5% 5% 4 6% 8% 30%	2603
June	1st to 10th	Night	26% 8% 3 7% 5% 5% 4 3 4 5% 32%	1330
	11th to 20th	Night	19% 7% 2 6% 5% 4 4 5% 6% 6% 37%	1330
	21st to end	Night	29% 8% 3 6% 5% 4 4 4 4 6% 28%	1330
July	1st to 10th	Night	13% 8% 3 6% 4 5% 5% 5% 6% 7% 37%	2210
	11th to 20th	Night	18% 8% 2 6% 5% 4 5% 4 6% 6% 36%	2210
	21st to end	Night	11% 6% 3 7% 4 4 5% 4 5% 7% 44%	2710
August	1st to 10th	Night	17% 6% 3 8% 6% 5% 6% 5% 6% 7% 31%	2825
	11th to 20th	Night	12% 8% 3 8% 5% 4 5% 5% 6% 7% 36%	2782
	21st to end	Night	14% 5% 2 5% 3 4 4 4 5% 7% 47%	3145
September	1st to 10th	Night	17% 5% 2 6% 4 3 3 3 4 7% 46%	1900
	11th to 20th	Night	15% 7% 2 5% 4 3 3 3 6% 6% 48%	2051
	21st to end	Night	19% 5% 2 6% 4 4 3 3 5% 6% 44%	2095
October	1st to 10th	Night	19% 6% 2 6% 4 4 5% 3 5% 5% 42%	2280
	11th to 20th	Night	19% 8% 3 6% 4 4 4 3 3 7% 40%	2280
	21st to end	Night	22% 9% 3 6% 4 3 4 3 4 6% 35%	2608
November	1st to 10th	Night	21% 10% 3 6% 4 4 4 3 5% 5% 35%	2694
	11th to 20th	Night	22% 10% 3 5% 5% 5% 4 3 6% 6% 30%	2800
	21st to end	Night	23% 10% 3 8% 5% 4 4 3 5% 5% 31%	2800
December	1st to 10th	Night	15% 10% 3 7% 5% 3 4 4 5% 6% 38%	4636
	11th to 20th	Night	22% 10% 3 6% 4 3 4 3 5% 5% 35%	5591
	21st to end	Night	19% 12% 4 10% 5% 4 4 3 4 5% 31%	7502

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	61% 6% 11% 13% 9% 1	3158
	11th to 20th	Day	58% 6% 12% 14% 10% 1	3270
	21st to end	Day	39% 8% 11% 21% 20% 2	4300
February	1st to 10th	Day	51% 7% 10% 18% 13% 2	1800
	11th to 20th	Day	56% 4 10% 18% 10% 1	1761
	21st to end	Day	52% 4 8% 21% 11% 2	1457
March	1st to 10th	Day	54% 7% 11% 19% 7% 2	3335
	11th to 20th	Day	64% 6% 9% 14% 5% 2	3480
	21st to end	Day	61% 4 6% 17% 10% 2	3816
April	1st to 10th	Day	58% 4 8% 16% 11% 3	2238
	11th to 20th	Day	51% 5% 10% 21% 12% 2	2442
	21st to end	Day	56% 5% 8% 15% 12% 4	2470
May	1st to 10th	Day	60% 5% 8% 18% 8% 1	4206
	11th to 20th	Day	49% 6% 15% 22% 7% 1	4402
	21st to end	Day	50% 9% 11% 18% 11%	4996
June	1st to 10th	Day	57% 6% 11% 16% 8% 1	2850
	11th to 20th	Day	48% 7% 12% 20% 10% 2	2850
	21st to end	Day	58% 6% 11% 16% 9%	2850
July	1st to 10th	Day	48% 8% 16% 18% 10%	4685
	11th to 20th	Day	46% 7% 15% 24% 8%	4679
	21st to end	Day	44% 9% 16% 22% 8%	4646
August	1st to 10th	Day	49% 8% 14% 20% 8%	4092
	11th to 20th	Day	45% 9% 15% 23% 7%	4084
	21st to end	Day	38% 7% 14% 24% 17%	4510
September	1st to 10th	Day	41% 8% 13% 24% 13%	2280
	11th to 20th	Day	42% 5% 12% 25% 14% 1	2126
	21st to end	Day	44% 6% 10% 24% 14% 1	2084
October	1st to 10th	Day	42% 6% 17% 25% 9% 1	3160
	11th to 20th	Day	46% 7% 12% 26% 9%	3140
	21st to end	Day	41% 7% 17% 20% 15%	3252
November	1st to 10th	Day	51% 5% 12% 22% 9% 1	1603
	11th to 20th	Day	53% 5% 14% 15% 12% 2	1600
	21st to end	Day	55% 6% 14% 17% 8%	1600
December	1st to 10th	Day	51% 5% 15% 21% 8%	2549
	11th to 20th	Day	54% 4 11% 18% 11% 2	2618
	21st to end	Day	54% 6% 10% 16% 12% 3	3476
January	1st to 10th	Night	55% 6% 15% 18% 5% 1	6808
	11th to 20th	Night	55% 8% 12% 17% 7% 1	6700
	21st to end	Night	38% 6% 11% 25% 17% 3	6653
February	1st to 10th	Night	50% 6% 12% 16% 13% 3	2600
	11th to 20th	Night	57% 5% 9% 16% 12% 1	2536
	21st to end	Night	53% 4 8% 19% 13% 3	1995
March	1st to 10th	Night	59% 8% 8% 16% 8% 1	3517
	11th to 20th	Night	64% 7% 8% 12% 8% 1	3480
	21st to end	Night	60% 4 6% 18% 10% 2	3816
April	1st to 10th	Night	57% 4 8% 15% 11% 3	1936
	11th to 20th	Night	50% 6% 9% 18% 14% 2	1688
	21st to end	Night	55% 4 9% 15% 14% 3	1710
May	1st to 10th	Night	56% 7% 12% 16% 9% 1	2756
	11th to 20th	Night	45% 7% 16% 24% 7% 1	2507
	21st to end	Night	47% 11% 16% 17% 8%	2604
June	1st to 10th	Night	56% 4 11% 20% 9% 1	1330
	11th to 20th	Night	47% 7% 12% 25% 8% 2	1330
	21st to end	Night	57% 8% 10% 17% 7% 1	1330
July	1st to 10th	Night	44% 8% 17% 19% 11%	2175
	11th to 20th	Night	47% 7% 14% 26% 6%	2168
	21st to end	Night	39% 9% 17% 25% 10%	2624
August	1st to 10th	Night	52% 9% 13% 20% 7%	2813
	11th to 20th	Night	42% 9% 19% 23% 6%	2809
	21st to end	Night	36% 8% 17% 24% 14% 1	3144
September	1st to 10th	Night	39% 6% 12% 30% 13% 1	1900
	11th to 20th	Night	37% 6% 15% 29% 13% 1	2051
	21st to end	Night	41% 6% 11% 27% 13% 1	2095
October	1st to 10th	Night	46% 6% 14% 25% 9%	3800
	11th to 20th	Night	44% 5% 11% 30% 10%	3779
	21st to end	Night	42% 5% 17% 23% 13%	4295
November	1st to 10th	Night	51% 5% 12% 21% 10% 1	2694
	11th to 20th	Night	54% 6% 12% 17% 10% 1	2800
	21st to end	Night	55% 6% 14% 16% 8%	2800
December	1st to 10th	Night	46% 5% 13% 26% 10%	4636
	11th to 20th	Night	49% 5% 10% 22% 13% 1	5592
	21st to end	Night	56% 6% 10% 18% 9% 1	7502

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% 22% 33% 14% 1	200
	11th to 20th	Day	36% 20% 24% 13% 7% 1	200
	21st to end	Day	19% 21% 35% 19% 5% 1	365
February	1st to 10th	Day	28% 21% 28% 17% 5% 2	400
	11th to 20th	Day	25% 25% 32% 14% 4 1	396
	21st to end	Day	24% 21% 34% 18% 3	329
March	1st to 10th	Day	31% 21% 32% 13% 3 1	460
	11th to 20th	Day	30% 19% 30% 15% 5% 2	460
	21st to end	Day	33% 20% 28% 14% 4 1	506
April	1st to 10th	Day	36% 22% 29% 11% 2 1	460
	11th to 20th	Day	32% 23% 26% 15% 4 1	452
	21st to end	Day	35% 17% 27% 15% 5% 1	460
May	1st to 10th	Day	37% 19% 25% 14% 5% 1	510
	11th to 20th	Day	29% 16% 28% 18% 8% 1	674
	21st to end	Day	28% 18% 34% 16% 4	735
June	1st to 10th	Day	33% 17% 28% 15% 7% 1	680
	11th to 20th	Day	24% 18% 31% 21% 6% 1	680
	21st to end	Day	31% 14% 29% 21% 5%	680
July	1st to 10th	Day	20% 14% 37% 19% 9% 1	670
	11th to 20th	Day	16% 12% 40% 24% 7% 1	668
	21st to end	Day	17% 13% 37% 24% 8% 1	660
August	1st to 10th	Day	15% 13% 41% 23% 7% 1	486
	11th to 20th	Day	18% 12% 30% 29% 9% 1	479
	21st to end	Day	19% 13% 30% 26% 11% 2	539
September	1st to 10th	Day	18% 14% 37% 22% 8% 1	490
	11th to 20th	Day	22% 13% 35% 20% 7% 3	490
	21st to end	Day	21% 16% 34% 18% 8% 3	486
October	1st to 10th	Day	21% 16% 27% 23% 12% 2	390
	11th to 20th	Day	29% 16% 28% 17% 8% 2	390
	21st to end	Day	30% 22% 29% 13% 6% 1	429
November	1st to 10th	Day	30% 18% 31% 15% 4 1	395
	11th to 20th	Day	31% 22% 27% 14% 6% 1	400
	21st to end	Day	34% 20% 29% 14% 3 1	400
December	1st to 10th	Day	29% 17% 31% 18% 4 1	365
	11th to 20th	Day	37% 21% 31% 9% 3	200
	21st to end	Day	30% 19% 33% 15% 4	220
January	1st to 10th	Night	23% 20% 35% 18% 4	900
	11th to 20th	Night	25% 18% 32% 20% 5%	873
	21st to end	Night	18% 20% 36% 21% 5%	880
February	1st to 10th	Night	22% 19% 36% 18% 5%	800
	11th to 20th	Night	27% 20% 35% 14% 3	783
	21st to end	Night	23% 16% 37% 20% 4	629
March	1st to 10th	Night	27% 16% 36% 18% 2	760
	11th to 20th	Night	25% 18% 33% 18% 6% 1	760
	21st to end	Night	24% 18% 35% 18% 5%	836
April	1st to 10th	Night	32% 16% 30% 19% 2	625
	11th to 20th	Night	29% 13% 36% 15% 6%	564
	21st to end	Night	33% 15% 27% 20% 4 1	570
May	1st to 10th	Night	29% 16% 28% 22% 5%	570
	11th to 20th	Night	27% 11% 33% 22% 7%	562
	21st to end	Night	18% 19% 37% 21% 4	535
June	1st to 10th	Night	30% 9% 29% 26% 5%	380
	11th to 20th	Night	22% 12% 29% 27% 9% 1	380
	21st to end	Night	31% 7% 28% 26% 7%	380
July	1st to 10th	Night	18% 10% 43% 22% 7%	370
	11th to 20th	Night	17% 5% 35% 33% 9%	368
	21st to end	Night	17% 11% 31% 32% 9%	527
August	1st to 10th	Night	17% 7% 36% 31% 9%	568
	11th to 20th	Night	17% 7% 31% 36% 9% 1	562
	21st to end	Night	16% 10% 29% 31% 12% 1	627
September	1st to 10th	Night	20% 9% 39% 26% 6%	570
	11th to 20th	Night	19% 10% 33% 28% 10% 1	721
	21st to end	Night	21% 13% 33% 23% 10%	760
October	1st to 10th	Night	23% 11% 32% 23% 9% 1	760
	11th to 20th	Night	22% 14% 36% 20% 8%	760
	21st to end	Night	26% 21% 32% 18% 4	836
November	1st to 10th	Night	29% 15% 33% 19% 4	860
	11th to 20th	Night	30% 18% 29% 16% 6% 1	900
	21st to end	Night	31% 18% 27% 19% 4	900
December	1st to 10th	Night	29% 15% 36% 16% 3	900
	11th to 20th	Night	29% 20% 33% 14% 3	900
	21st to end	Night	29% 19% 29% 18% 4 1	990

Page generated at 2025-02-18 04:26:30. Version ac07

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