Mattoon weather in December

In December, Mattoon sees average daytime highs of 41°F and overnight lows near 27°F, with 2.7 in of precipitation across 8.9 wet days and about 9.3 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 44°F in the first days to 38°F by the end. The sky is clear or mostly clear about 25% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of December to 9 h 12 min by month's end. Set against the rest of the year, December is Mattoon's 11th-clearest and 6th-windiest month. For the whole year in context, see Mattoon's year-round climate.

Daytime high: 41°; 11th warmest
Overnight low: 27°; 3rd coldest
Precipitation: 2.7 in; 8.9 wet days
Daylight: 9 h 12 min; 7:13 AM – 4:26 PM
Cloud cover: 68%; 11th clearest
Wind: 9 mph; 6th windiest
Solar energy: 1.79 kWh/m²
Travel score: 0.2; out of 10

Mattoon is city in Illinois, United States.

Density: 676/km²; people per km²
Founded: 1853

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

← November Mattoon 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 44°F in the first days to 38°F by the end.

A typical December day in Mattoon reaches about 41°F in the afternoon and slips back to 27°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 26°F and 55°F. Set against its neighbours, December runs about 11°F cooler than November and about 4°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)	45	45	44	44	44	43	43	42	42	42	41	41	41	41	40	40	40	40	40	40	39	39	39	39	39	39	38	38	38	38	38
Avg low (°F)	31	30	30	30	29	29	29	28	28	28	28	28	27	27	27	27	26	26	26	26	26	26	25	25	25	25	25	25	24	24	24

	Avg high (°F)	Avg low (°F)
1	45	31
2	45	30
3	44	30
4	44	30
5	44	29
6	43	29
7	43	29
8	42	28
9	42	28
10	42	28
11	41	28
12	41	28
13	41	27
14	41	27
15	40	27
16	40	27
17	40	26
18	40	26
19	40	26
20	40	26
21	39	26
22	39	26
23	39	25
24	39	25
25	39	25
26	39	25
27	38	25
28	38	25
29	38	24
30	38	24
31	38	24

How December really feels in Mattoon

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

wind chill below the day's low

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

Mattoon weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 11th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	37° / 22°	3.0	8.9	3.8	9.5	0.0
Feb	41° / 25°	2.5	7.8	3.4	10.4	0.3
Mar	52° / 34°	3.4	10.5	1.6	11.7	2.7
Apr	64° / 45°	4.8	11.8	0.3	13	5.4
May	74° / 56°	4.7	12.7	0	14.1	6.3
Jun	82° / 65°	4.2	11.2	0	14.7	5.9
Jul	85° / 68°	3.7	10.7	0	14.5	5.4
Aug	83° / 65°	3.0	8.5	0	13.5	6.0
Sep	78° / 58°	2.9	7.2	0	12.3	7.3
Oct	65° / 46°	3.3	8.2	0.1	11	6.2
Nov	52° / 36°	3.5	8.3	0.7	9.8	2.8
Dec	41° / 27°	2.7	8.9	2.9	9.3	0.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 65%.

	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 (%)	37	37	37	37	37	37	36	36	35	35	35	35	36	36	36	35	36	35	35	35	35	35	35	36	36	34	34	35	35	35	35
Cloudier (%)	63	63	63	63	63	63	64	64	65	65	65	65	64	64	64	65	64	65	65	65	65	65	65	64	64	66	66	65	65	65	65

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	35	65
12	35	65
13	36	64
14	36	64
15	36	64
16	35	65
17	36	64
18	35	65
19	35	65
20	35	65
21	35	65
22	35	65
23	35	65
24	36	64
25	36	64
26	34	66
27	34	66
28	35	65
29	35	65
30	35	65
31	35	65

Chance of precipitation in December

Any precipitationSnow

Mattoon gets around 2.7 in of rain and snow over 8.9 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 29% and peaks near 30% on the wettest days, and about 3 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 (%)	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	30	29	29	29	29	28	28	28	28	28	28	28	28	28	28
Snow chance (%)	6	7	7	7	8	8	8	9	9	9	9	9	10	10	10	10	10	10	10	10	10	10	10	10	9	9	9	9	9	9	9

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

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 99% 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 (%)	98	98	98	98	98	98	98	98	98	99	99	99	99	99	99	99	100	100	100	100	100	100	100	99	99	99	99	99	99	99	99
Comfortable (%)	2	2	2	2	2	2	2	2	2	1	1	1	1	1	1	1	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

Wind in December

Winds average 9 mph in December.

Across December, daily wind ranges from about 9 mph on the calmest days to 9 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)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9
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	9	light breeze
2	9	light breeze
3	9	light breeze
4	9	light breeze
5	9	light breeze
6	9	light breeze
7	9	light breeze
8	9	light breeze
9	9	light breeze
10	9	light breeze
11	9	light breeze
12	9	light breeze
13	9	light breeze
14	9	light breeze
15	9	light breeze
16	9	light breeze
17	9	light breeze
18	9	light breeze
19	9	light breeze
20	9	light breeze
21	9	light breeze
22	9	light breeze
23	9	light breeze
24	9	light breeze
25	9	light breeze
26	9	light breeze
27	9	light breeze
28	9	light breeze
29	9	light breeze
30	9	light breeze
31	9	light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:01 AM to 7:19 AM, and sunset from 4:26 PM to 4:34 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)	9.4	9.4	9.4	9.4	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.3	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2	9.2
Sunrise (AM)	7:01	7:02	7:03	7:04	7:04	7:05	7:06	7:07	7:08	7:09	7:09	7:10	7:11	7:12	7:12	7:13	7:13	7:14	7:15	7:15	7:16	7:16	7:17	7:17	7:17	7:18	7:18	7:18	7:19	7:19	7:19
Sunset (PM)	4:26	4:26	4:25	4:25	4:25	4:25	4:25	4:25	4:25	4:25	4:25	4:26	4:26	4:26	4:26	4:26	4:27	4:27	4:27	4:28	4:28	4:29	4:29	4:30	4:30	4:31	4:31	4:32	4:33	4:33	4:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.4	7:01	4:26
2	9.4	7:02	4:26
3	9.4	7:03	4:25
4	9.4	7:04	4:25
5	9.3	7:04	4:25
6	9.3	7:05	4:25
7	9.3	7:06	4:25
8	9.3	7:07	4:25
9	9.3	7:08	4:25
10	9.3	7:09	4:25
11	9.3	7:09	4:25
12	9.3	7:10	4:26
13	9.2	7:11	4:26
14	9.2	7:12	4:26
15	9.2	7:12	4:26
16	9.2	7:13	4:26
17	9.2	7:13	4:27
18	9.2	7:14	4:27
19	9.2	7:15	4:27
20	9.2	7:15	4:28
21	9.2	7:16	4:28
22	9.2	7:16	4:29
23	9.2	7:17	4:29
24	9.2	7:17	4:30
25	9.2	7:17	4:30
26	9.2	7:18	4:31
27	9.2	7:18	4:31
28	9.2	7:18	4:32
29	9.2	7:19	4:33
30	9.2	7:19	4:33
31	9.2	7:19	4:34

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.79 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.79 kWh/m² to a high of 6.44 kWh/m² in June across the year — December's 1.79 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)	1.9	1.9	1.9	1.9	1.9	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8
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	1.9	Dim
2	1.9	Dim
3	1.9	Dim
4	1.9	Dim
5	1.9	Dim
6	1.8	Dim
7	1.8	Dim
8	1.8	Dim
9	1.8	Dim
10	1.8	Dim
11	1.8	Dim
12	1.8	Dim
13	1.8	Dim
14	1.8	Dim
15	1.8	Dim
16	1.8	Dim
17	1.8	Dim
18	1.8	Dim
19	1.8	Dim
20	1.8	Dim
21	1.8	Dim
22	1.8	Dim
23	1.8	Dim
24	1.8	Dim
25	1.8	Dim
26	1.8	Dim
27	1.8	Dim
28	1.8	Dim
29	1.8	Dim
30	1.8	Dim
31	1.8	Dim

Planning a trip in December

Is December a good time to visit Mattoon?

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

0.2

Sightseeing

11th-best month of the year

0.0

Beach & pool

10th-best month of the year

December is a weaker month for outdoor sightseeing in Mattoon.

What to pack for Mattoon in December

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

In December, Mattoon sees daytime highs around 41°F and nights near 27°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

UV index in Mattoon in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mattoon peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	5	6	8	9	9	8	6	4	3	2
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	5	Moderate
Apr	6	High
May	8	Very high
Jun	9	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	4	Moderate
Nov	3	Moderate
Dec	2	Low

Air quality in Mattoon 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 Mattoon is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 8 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)	10	13	13	11	14	15	16	14	11	8	8	9
Level	Good	Moderate	Moderate	Good	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	10	Good
Feb	13	Moderate
Mar	13	Moderate
Apr	11	Good
May	14	Moderate
Jun	15	Moderate
Jul	16	Moderate
Aug	14	Moderate
Sep	11	Good
Oct	8	Good
Nov	8	Good
Dec	9	Good

Location & terrain

Where is Mattoon?

Mattoon sits at 39.5°N, 88.4°W, 735 ft above sea level, in United States. The nearest listed city is Charleston, 11 mi away.

Topography around Mattoon

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

Within 2 miles, the terrain around Mattoon has only modest variations in elevation — a maximum elevation change of 75 ft around an average of 712 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 236 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 446 ft.

The land around Mattoon is covered by cropland (49%) within 2 miles, cropland (80%) within 10 miles, and cropland (76%) within 50 miles.

2 miles

75 ft

cropland 49%

10 miles

236 ft

cropland 80%

50 miles

446 ft

cropland 76%

treesgrasslandcroplandartificial surfaceswater

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

December weather nearby: Charleston 11 mi · Decatur 40 mi · Urbana 44 mi · Champaign 44 mi · Terre Haute 51 mi · Danville 59 mi · Springfield 71 mi · Vincennes 71 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 Mattoon (39.4831°, -88.3728°, elevation 735 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	45	31
2	45	30
3	44	30
4	44	30
5	44	29
6	43	29
7	43	29
8	42	28
9	42	28
10	42	28
11	41	28
12	41	28
13	41	27
14	41	27
15	40	27
16	40	27
17	40	26
18	40	26
19	40	26
20	40	26
21	39	26
22	39	26
23	39	25
24	39	25
25	39	25
26	39	25
27	38	25
28	38	25
29	38	24
30	38	24
31	38	24

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	35	65
12	35	65
13	36	64
14	36	64
15	36	64
16	35	65
17	36	64
18	35	65
19	35	65
20	35	65
21	35	65
22	35	65
23	35	65
24	36	64
25	36	64
26	34	66
27	34	66
28	35	65
29	35	65
30	35	65
31	35	65

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

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

	Solar energy (kWh/m²)	Level
1	1.9	Dim
2	1.9	Dim
3	1.9	Dim
4	1.9	Dim
5	1.9	Dim
6	1.8	Dim
7	1.8	Dim
8	1.8	Dim
9	1.8	Dim
10	1.8	Dim
11	1.8	Dim
12	1.8	Dim
13	1.8	Dim
14	1.8	Dim
15	1.8	Dim
16	1.8	Dim
17	1.8	Dim
18	1.8	Dim
19	1.8	Dim
20	1.8	Dim
21	1.8	Dim
22	1.8	Dim
23	1.8	Dim
24	1.8	Dim
25	1.8	Dim
26	1.8	Dim
27	1.8	Dim
28	1.8	Dim
29	1.8	Dim
30	1.8	Dim
31	1.8	Dim

	Avg high (°F)	Avg low (°F)
1	45	31
2	45	30
3	44	30
4	44	30
5	44	29
6	43	29
7	43	29
8	42	28
9	42	28
10	42	28
11	41	28
12	41	28
13	41	27
14	41	27
15	40	27
16	40	27
17	40	26
18	40	26
19	40	26
20	40	26
21	39	26
22	39	26
23	39	25
24	39	25
25	39	25
26	39	25
27	38	25
28	38	25
29	38	24
30	38	24
31	38	24

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	35	65
12	35	65
13	36	64
14	36	64
15	36	64
16	35	65
17	36	64
18	35	65
19	35	65
20	35	65
21	35	65
22	35	65
23	35	65
24	36	64
25	36	64
26	34	66
27	34	66
28	35	65
29	35	65
30	35	65
31	35	65

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

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

	Solar energy (kWh/m²)	Level
1	1.9	Dim
2	1.9	Dim
3	1.9	Dim
4	1.9	Dim
5	1.9	Dim
6	1.8	Dim
7	1.8	Dim
8	1.8	Dim
9	1.8	Dim
10	1.8	Dim
11	1.8	Dim
12	1.8	Dim
13	1.8	Dim
14	1.8	Dim
15	1.8	Dim
16	1.8	Dim
17	1.8	Dim
18	1.8	Dim
19	1.8	Dim
20	1.8	Dim
21	1.8	Dim
22	1.8	Dim
23	1.8	Dim
24	1.8	Dim
25	1.8	Dim
26	1.8	Dim
27	1.8	Dim
28	1.8	Dim
29	1.8	Dim
30	1.8	Dim
31	1.8	Dim

	Avg high (°F)	Avg low (°F)
1	45	31
2	45	30
3	44	30
4	44	30
5	44	29
6	43	29
7	43	29
8	42	28
9	42	28
10	42	28
11	41	28
12	41	28
13	41	27
14	41	27
15	40	27
16	40	27
17	40	26
18	40	26
19	40	26
20	40	26
21	39	26
22	39	26
23	39	25
24	39	25
25	39	25
26	39	25
27	38	25
28	38	25
29	38	24
30	38	24
31	38	24

	Clearer (%)	Cloudier (%)
1	37	63
2	37	63
3	37	63
4	37	63
5	37	63
6	37	63
7	36	64
8	36	64
9	35	65
10	35	65
11	35	65
12	35	65
13	36	64
14	36	64
15	36	64
16	35	65
17	36	64
18	35	65
19	35	65
20	35	65
21	35	65
22	35	65
23	35	65
24	36	64
25	36	64
26	34	66
27	34	66
28	35	65
29	35	65
30	35	65
31	35	65

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

	Dry (%)	Comfortable (%)
1	98	2
2	98	2
3	98	2
4	98	2
5	98	2
6	98	2
7	98	2
8	98	2
9	98	2
10	99	1
11	99	1
12	99	1
13	99	1
14	99	1
15	99	1
16	99	1
17	100	0
18	100	0
19	100	0
20	100	0
21	100	0
22	100	0
23	100	0
24	99	1
25	99	1
26	99	1
27	99	1
28	99	1
29	99	1
30	99	1
31	99	1

	Solar energy (kWh/m²)	Level
1	1.9	Dim
2	1.9	Dim
3	1.9	Dim
4	1.9	Dim
5	1.9	Dim
6	1.8	Dim
7	1.8	Dim
8	1.8	Dim
9	1.8	Dim
10	1.8	Dim
11	1.8	Dim
12	1.8	Dim
13	1.8	Dim
14	1.8	Dim
15	1.8	Dim
16	1.8	Dim
17	1.8	Dim
18	1.8	Dim
19	1.8	Dim
20	1.8	Dim
21	1.8	Dim
22	1.8	Dim
23	1.8	Dim
24	1.8	Dim
25	1.8	Dim
26	1.8	Dim
27	1.8	Dim
28	1.8	Dim
29	1.8	Dim
30	1.8	Dim
31	1.8	Dim