Grand Forks weather in December

In December, Grand Forks sees average daytime highs of 21°F and overnight lows near 6°F, with 1.0 in of precipitation across 5.9 wet days and about 8.3 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 25°F in the first days to 17°F by the end. The sky is clear or mostly clear about 21% of the time in December, and the air most often feels dry.

Daylight stretches from about 8 h 30 min at the start of December to 8 h 12 min by month's end. Set against the rest of the year, December is Grand Forks's 12th-clearest and 9th-windiest month. For the whole year in context, see Grand Forks's year-round climate.

Daytime high: 21°; 10th warmest
Overnight low: 6°; 3rd coldest
Precipitation: 1.0 in; 5.9 wet days
Daylight: 8 h 12 min; 8:18 AM – 4:30 PM
Cloud cover: 70%; 12th clearest
Wind: 8 mph; 9th windiest
Solar energy: 1.21 kWh/m²
Travel score: 0.0; out of 10

Grand Forks is city in North Dakota, United States.

Density: 810/km²; people per km²
Founded: 1870

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← November Grand Forks year-round climate January →Best places to visit in December

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 25°F in the first days to 17°F by the end.

A typical December day in Grand Forks reaches about 21°F in the afternoon and slips back to 6°F overnight — a 15°F spread between the day's warmth and the night's chill. On most days the high lands between 1°F and 36°F. Set against its neighbours, December runs about 14°F cooler than November and about 5°F warmer than January.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	26	26	25	25	24	24	24	23	23	22	22	22	22	21	21	21	21	20	20	20	20	19	19	19	18	18	18	17	17	17	17
Avg low (°F)	12	11	11	10	10	9	9	8	8	8	7	7	7	6	6	6	6	5	5	5	5	4	4	4	4	3	3	2	2	2	1

	Avg high (°F)	Avg low (°F)
1	26	12
2	26	11
3	25	11
4	25	10
5	24	10
6	24	9
7	24	9
8	23	8
9	23	8
10	22	8
11	22	7
12	22	7
13	22	7
14	21	6
15	21	6
16	21	6
17	21	6
18	20	5
19	20	5
20	20	5
21	20	5
22	19	4
23	19	4
24	19	4
25	18	4
26	18	3
27	18	3
28	17	2
29	17	2
30	17	2
31	17	1

How December really feels in Grand Forks

Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 31 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

31 feel bitter (≤ 14°F)

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Grand Forks weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 10th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	16° / -1°	0.7	5.1	5.3	8.6	0.0
Feb	21° / 3°	0.6	3.9	4.2	9.9	0.0
Mar	35° / 17°	1.2	6	4.2	11.6	0.1
Apr	52° / 32°	1.7	7.4	2.1	13.4	2.9
May	66° / 45°	3.4	11.2	0.2	14.9	5.7
Jun	75° / 56°	4.1	12.2	0	15.7	6.5
Jul	79° / 59°	3.5	10.1	0	15.4	6.8
Aug	78° / 56°	3.1	9.2	0	14.1	7.1
Sep	68° / 47°	2.7	8	0	12.4	6.6
Oct	53° / 35°	2.3	7.9	1.3	10.6	3.1
Nov	35° / 20°	1.1	5.4	4.1	9	0.0
Dec	21° / 6°	1.0	5.9	6.4	8.3	0.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in December, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 67%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	35	35	36	36	36	36	35	35	35	35	35	33	33	33	32	32	32	31	31	31	30	30	30	30	31	32	32	33	34	35	35
Cloudier (%)	65	65	64	64	64	64	65	65	65	65	65	67	67	67	68	68	68	69	69	69	70	70	70	70	69	68	68	67	66	65	65

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	36	64
4	36	64
5	36	64
6	36	64
7	35	65
8	35	65
9	35	65
10	35	65
11	35	65
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	32	68
18	31	69
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	30	70
25	31	69
26	32	68
27	32	68
28	33	67
29	34	66
30	35	65
31	35	65

Chance of precipitation in December

Any precipitationSnow

Grand Forks gets around 1.0 in of rain and snow over 5.9 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 18% and peaks near 20% on the wettest days, and about 6 days bring snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	18	18	18	19	19	20	20	20	20	20	20	20	20	20
Snow chance (%)	19	19	19	18	18	18	18	18	18	18	18	18	18	18	18	19	19	19	20	20	21	21	22	22	22	22	22	22	22	21	21

	Rain chance (%)	Snow chance (%)
1	17	19
2	17	19
3	17	19
4	17	18
5	17	18
6	17	18
7	17	18
8	17	18
9	17	18
10	17	18
11	17	18
12	17	18
13	17	18
14	17	18
15	17	18
16	17	19
17	17	19
18	18	19
19	18	20
20	18	20
21	19	21
22	19	21
23	20	22
24	20	22
25	20	22
26	20	22
27	20	22
28	20	22
29	20	22
30	20	21
31	20	21

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in December

Winds average 8 mph in December.

Across December, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8	8
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	8	light breeze
2	8	light breeze
3	8	light breeze
4	8	light breeze
5	8	light breeze
6	8	light breeze
7	8	light breeze
8	8	light breeze
9	8	light breeze
10	8	light breeze
11	8	light breeze
12	8	light breeze
13	8	light breeze
14	8	light breeze
15	8	light breeze
16	8	light breeze
17	8	light breeze
18	8	light breeze
19	8	light breeze
20	8	light breeze
21	8	light breeze
22	8	light breeze
23	8	light breeze
24	8	light breeze
25	8	light breeze
26	8	light breeze
27	8	light breeze
28	8	light breeze
29	8	light breeze
30	8	light breeze
31	8	light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 8 h 30 min at the start of December to 8 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over December. Sunrise moves from 8:04 AM to 8:24 AM, and sunset from 4:32 PM to 4:38 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	8.5	8.4	8.4	8.4	8.4	8.3	8.3	8.3	8.3	8.3	8.3	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2
Sunrise (AM)	8:04	8:05	8:06	8:07	8:08	8:09	8:10	8:11	8:12	8:13	8:14	8:15	8:16	8:17	8:18	8:18	8:19	8:20	8:20	8:21	8:21	8:22	8:22	8:23	8:23	8:23	8:24	8:24	8:24	8:24	8:24
Sunset (PM)	4:32	4:32	4:31	4:31	4:31	4:30	4:30	4:30	4:30	4:30	4:30	4:30	4:30	4:30	4:30	4:30	4:30	4:31	4:31	4:31	4:32	4:32	4:33	4:33	4:34	4:35	4:35	4:36	4:37	4:37	4:38

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	8.5	8:04	4:32
2	8.4	8:05	4:32
3	8.4	8:06	4:31
4	8.4	8:07	4:31
5	8.4	8:08	4:31
6	8.3	8:09	4:30
7	8.3	8:10	4:30
8	8.3	8:11	4:30
9	8.3	8:12	4:30
10	8.3	8:13	4:30
11	8.3	8:14	4:30
12	8.2	8:15	4:30
13	8.2	8:16	4:30
14	8.2	8:17	4:30
15	8.2	8:18	4:30
16	8.2	8:18	4:30
17	8.2	8:19	4:30
18	8.2	8:20	4:31
19	8.2	8:20	4:31
20	8.2	8:21	4:31
21	8.2	8:21	4:32
22	8.2	8:22	4:32
23	8.2	8:22	4:33
24	8.2	8:23	4:33
25	8.2	8:23	4:34
26	8.2	8:23	4:35
27	8.2	8:24	4:35
28	8.2	8:24	4:36
29	8.2	8:24	4:37
30	8.2	8:24	4:37
31	8.2	8:24	4:38

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.21 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.23 kWh/m² in July across the year — December's 1.21 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	1.3	1.3	1.3	1.3	1.3	1.3	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.2	1.3	1.3	1.3	1.3
Level	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim	Dim

	Solar energy (kWh/m²)	Level
1	1.3	Dim
2	1.3	Dim
3	1.3	Dim
4	1.3	Dim
5	1.3	Dim
6	1.3	Dim
7	1.2	Dim
8	1.2	Dim
9	1.2	Dim
10	1.2	Dim
11	1.2	Dim
12	1.2	Dim
13	1.2	Dim
14	1.2	Dim
15	1.2	Dim
16	1.2	Dim
17	1.2	Dim
18	1.2	Dim
19	1.2	Dim
20	1.2	Dim
21	1.2	Dim
22	1.2	Dim
23	1.2	Dim
24	1.2	Dim
25	1.2	Dim
26	1.2	Dim
27	1.2	Dim
28	1.3	Dim
29	1.3	Dim
30	1.3	Dim
31	1.3	Dim

Planning a trip in December

Hazard calendar for Grand Forks

In seasonPeak

None of Grand Forks's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Grand Forks's rainy season runs May–October, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is December a good time to visit Grand Forks?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

0.0

Sightseeing

9th-best month of the year

0.0

Beach & pool

8th-best month of the year

December is a weaker month for outdoor sightseeing in Grand Forks.

What to pack for Grand Forks in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Grand Forks sees daytime highs around 21°F and nights near 6°F. Pack a warm layer and a heavy coat. About 6 days see rain.

a warm layera heavy coat

UV index in Grand Forks in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Grand Forks peaks around June 19 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	1	3	4	5	8	7	7	5	3	1	1
Level	Low	Low	Moderate	Moderate	High	Very high	High	High	Moderate	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	1	Low
Mar	3	Moderate
Apr	4	Moderate
May	5	High
Jun	8	Very high
Jul	7	High
Aug	7	High
Sep	5	Moderate
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Air quality in Grand Forks in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Grand Forks is worst in August — around 16 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (October, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	9	10	14	12	11	11	16	16	10	6	7	8
Level	Good	Good	Moderate	Good	Good	Good	Moderate	Moderate	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	9	Good
Feb	10	Good
Mar	14	Moderate
Apr	12	Good
May	11	Good
Jun	11	Good
Jul	16	Moderate
Aug	16	Moderate
Sep	10	Good
Oct	6	Good
Nov	7	Good
Dec	8	Good

Location & terrain

Where is Grand Forks?

Grand Forks sits at 47.9°N, 97.0°W, 830 ft above sea level, in United States. The nearest listed city is West Fargo, 73 mi away.

Topography around Grand Forks

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Grand Forks.

Within 2 miles, the terrain around Grand Forks has only modest variations in elevation — a maximum elevation change of 98 ft around an average of 833 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 141 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 807 ft.

The land around Grand Forks is covered by artificial surfaces (35%), trees (26%) and grassland (25%) within 2 miles, cropland (74%) within 10 miles, and cropland (81%) within 50 miles.

2 miles

98 ft

artificial surfaces 35%

10 miles

141 ft

cropland 74%

50 miles

807 ft

cropland 81%

treesgrasslandcroplandartificial surfacesbare terrainwater

← November Grand Forks year-round climate January →Best places to visit in December

December weather nearby: West Fargo 73 mi · Fargo 73 mi · Moorhead 74 mi · Jamestown 105 mi · Steinbach 112 mi · Fort Garry South 129 mi · Winnipeg 135 mi · St. James-Assiniboia East 136 mi

United States travel facts

Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 100% of US; price level, 2025
GDP per capita: $90,027; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 5.8; per 100k, 2023
Road deaths: 12.7; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Grand Forks (47.9253°, -97.0328°, elevation 830 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°F)	Avg low (°F)
1	26	12
2	26	11
3	25	11
4	25	10
5	24	10
6	24	9
7	24	9
8	23	8
9	23	8
10	22	8
11	22	7
12	22	7
13	22	7
14	21	6
15	21	6
16	21	6
17	21	6
18	20	5
19	20	5
20	20	5
21	20	5
22	19	4
23	19	4
24	19	4
25	18	4
26	18	3
27	18	3
28	17	2
29	17	2
30	17	2
31	17	1

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	36	64
4	36	64
5	36	64
6	36	64
7	35	65
8	35	65
9	35	65
10	35	65
11	35	65
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	32	68
18	31	69
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	30	70
25	31	69
26	32	68
27	32	68
28	33	67
29	34	66
30	35	65
31	35	65

	Rain chance (%)	Snow chance (%)
1	17	19
2	17	19
3	17	19
4	17	18
5	17	18
6	17	18
7	17	18
8	17	18
9	17	18
10	17	18
11	17	18
12	17	18
13	17	18
14	17	18
15	17	18
16	17	19
17	17	19
18	18	19
19	18	20
20	18	20
21	19	21
22	19	21
23	20	22
24	20	22
25	20	22
26	20	22
27	20	22
28	20	22
29	20	22
30	20	21
31	20	21

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Solar energy (kWh/m²)	Level
1	1.3	Dim
2	1.3	Dim
3	1.3	Dim
4	1.3	Dim
5	1.3	Dim
6	1.3	Dim
7	1.2	Dim
8	1.2	Dim
9	1.2	Dim
10	1.2	Dim
11	1.2	Dim
12	1.2	Dim
13	1.2	Dim
14	1.2	Dim
15	1.2	Dim
16	1.2	Dim
17	1.2	Dim
18	1.2	Dim
19	1.2	Dim
20	1.2	Dim
21	1.2	Dim
22	1.2	Dim
23	1.2	Dim
24	1.2	Dim
25	1.2	Dim
26	1.2	Dim
27	1.2	Dim
28	1.3	Dim
29	1.3	Dim
30	1.3	Dim
31	1.3	Dim

	Avg high (°F)	Avg low (°F)
1	26	12
2	26	11
3	25	11
4	25	10
5	24	10
6	24	9
7	24	9
8	23	8
9	23	8
10	22	8
11	22	7
12	22	7
13	22	7
14	21	6
15	21	6
16	21	6
17	21	6
18	20	5
19	20	5
20	20	5
21	20	5
22	19	4
23	19	4
24	19	4
25	18	4
26	18	3
27	18	3
28	17	2
29	17	2
30	17	2
31	17	1

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	36	64
4	36	64
5	36	64
6	36	64
7	35	65
8	35	65
9	35	65
10	35	65
11	35	65
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	32	68
18	31	69
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	30	70
25	31	69
26	32	68
27	32	68
28	33	67
29	34	66
30	35	65
31	35	65

	Rain chance (%)	Snow chance (%)
1	17	19
2	17	19
3	17	19
4	17	18
5	17	18
6	17	18
7	17	18
8	17	18
9	17	18
10	17	18
11	17	18
12	17	18
13	17	18
14	17	18
15	17	18
16	17	19
17	17	19
18	18	19
19	18	20
20	18	20
21	19	21
22	19	21
23	20	22
24	20	22
25	20	22
26	20	22
27	20	22
28	20	22
29	20	22
30	20	21
31	20	21

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Solar energy (kWh/m²)	Level
1	1.3	Dim
2	1.3	Dim
3	1.3	Dim
4	1.3	Dim
5	1.3	Dim
6	1.3	Dim
7	1.2	Dim
8	1.2	Dim
9	1.2	Dim
10	1.2	Dim
11	1.2	Dim
12	1.2	Dim
13	1.2	Dim
14	1.2	Dim
15	1.2	Dim
16	1.2	Dim
17	1.2	Dim
18	1.2	Dim
19	1.2	Dim
20	1.2	Dim
21	1.2	Dim
22	1.2	Dim
23	1.2	Dim
24	1.2	Dim
25	1.2	Dim
26	1.2	Dim
27	1.2	Dim
28	1.3	Dim
29	1.3	Dim
30	1.3	Dim
31	1.3	Dim

	Avg high (°F)	Avg low (°F)
1	26	12
2	26	11
3	25	11
4	25	10
5	24	10
6	24	9
7	24	9
8	23	8
9	23	8
10	22	8
11	22	7
12	22	7
13	22	7
14	21	6
15	21	6
16	21	6
17	21	6
18	20	5
19	20	5
20	20	5
21	20	5
22	19	4
23	19	4
24	19	4
25	18	4
26	18	3
27	18	3
28	17	2
29	17	2
30	17	2
31	17	1

	Clearer (%)	Cloudier (%)
1	35	65
2	35	65
3	36	64
4	36	64
5	36	64
6	36	64
7	35	65
8	35	65
9	35	65
10	35	65
11	35	65
12	33	67
13	33	67
14	33	67
15	32	68
16	32	68
17	32	68
18	31	69
19	31	69
20	31	69
21	30	70
22	30	70
23	30	70
24	30	70
25	31	69
26	32	68
27	32	68
28	33	67
29	34	66
30	35	65
31	35	65

	Rain chance (%)	Snow chance (%)
1	17	19
2	17	19
3	17	19
4	17	18
5	17	18
6	17	18
7	17	18
8	17	18
9	17	18
10	17	18
11	17	18
12	17	18
13	17	18
14	17	18
15	17	18
16	17	19
17	17	19
18	18	19
19	18	20
20	18	20
21	19	21
22	19	21
23	20	22
24	20	22
25	20	22
26	20	22
27	20	22
28	20	22
29	20	22
30	20	21
31	20	21

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Solar energy (kWh/m²)	Level
1	1.3	Dim
2	1.3	Dim
3	1.3	Dim
4	1.3	Dim
5	1.3	Dim
6	1.3	Dim
7	1.2	Dim
8	1.2	Dim
9	1.2	Dim
10	1.2	Dim
11	1.2	Dim
12	1.2	Dim
13	1.2	Dim
14	1.2	Dim
15	1.2	Dim
16	1.2	Dim
17	1.2	Dim
18	1.2	Dim
19	1.2	Dim
20	1.2	Dim
21	1.2	Dim
22	1.2	Dim
23	1.2	Dim
24	1.2	Dim
25	1.2	Dim
26	1.2	Dim
27	1.2	Dim
28	1.3	Dim
29	1.3	Dim
30	1.3	Dim
31	1.3	Dim