Acton weather in December

In December, Acton sees average daytime highs of 40°F and overnight lows near 26°F, with 4.1 in of precipitation across 10.3 wet days and about 8.9 hours of daylight. It is the 10th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 44°F in the first days to 37°F by the end. The sky is clear or mostly clear about 31% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 06 min at the start of December to 8 h 54 min by month's end. Set against the rest of the year, December is Acton's 7th-clearest and 4th-windiest month. For the whole year in context, see Acton's year-round climate.

Daytime high: 40°; 10th warmest
Overnight low: 26°; 3rd coldest
Precipitation: 4.1 in; 10.3 wet days
Daylight: 8 h 54 min; 7:15 AM – 4:09 PM
Cloud cover: 59%; 7th clearest
Wind: 8 mph; 4th windiest
Solar energy: 1.59 kWh/m²
Travel score: 0.1; out of 10

Acton is town in Massachusetts, United States.

Founded: 1639

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

← November Acton 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 37°F by the end.

A typical December day in Acton reaches about 40°F in the afternoon and slips back to 26°F overnight — a 14°F spread between the day's warmth and the night's chill. On most days the high lands between 28°F and 53°F. Set against its neighbours, December runs about 10°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)	44	44	44	43	43	42	42	42	41	41	40	40	40	40	39	39	39	39	39	39	38	38	38	38	38	38	38	37	37	37	37
Avg low (°F)	30	30	29	29	29	28	28	28	27	27	27	26	26	26	26	26	25	25	25	25	25	24	24	24	24	24	24	23	23	23	23

	Avg high (°F)	Avg low (°F)
1	44	30
2	44	30
3	44	29
4	43	29
5	43	29
6	42	28
7	42	28
8	42	28
9	41	27
10	41	27
11	40	27
12	40	26
13	40	26
14	40	26
15	39	26
16	39	26
17	39	25
18	39	25
19	39	25
20	39	25
21	38	25
22	38	24
23	38	24
24	38	24
25	38	24
26	38	24
27	38	24
28	37	23
29	37	23
30	37	23
31	37	23

How December really feels in Acton

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

2 feel bitter (≤ 14°F)

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

Acton weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	35° / 20°	3.2	9.6	6.2	9.2	0.0
Feb	37° / 22°	3.0	8.5	5.7	10.3	0.0
Mar	45° / 29°	4.1	11.1	5.1	11.6	1.1
Apr	57° / 39°	3.6	10.5	1.2	13.1	4.0
May	67° / 49°	3.1	10.5	0	14.4	6.0
Jun	77° / 58°	3.5	10.7	0	15.1	6.5
Jul	83° / 64°	3.2	10.3	0	14.8	5.8
Aug	81° / 62°	3.4	9.6	0	13.7	6.5
Sep	73° / 55°	3.4	8	0	12.3	7.0
Oct	61° / 44°	3.7	9.3	0.2	10.8	5.3
Nov	50° / 34°	3.3	9.1	1.1	9.6	2.3
Dec	40° / 26°	4.1	10.3	5	8.9	0.1

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 53%.

	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 (%)	48	47	47	47	47	47	47	47	47	45	45	45	45	46	46	45	45	46	46	46	46	46	47	48	49	49	49	50	50	50	50
Cloudier (%)	52	53	53	53	53	53	53	53	53	55	55	55	55	54	54	55	55	54	54	54	54	54	53	52	51	51	51	50	50	50	50

	Clearer (%)	Cloudier (%)
1	48	52
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	47	53
9	47	53
10	45	55
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	45	55
17	45	55
18	46	54
19	46	54
20	46	54
21	46	54
22	46	54
23	47	53
24	48	52
25	49	51
26	49	51
27	49	51
28	50	50
29	50	50
30	50	50
31	50	50

Chance of precipitation in December

Any precipitationSnow

Acton gets around 4.1 in of rain and snow over 10.3 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 33% and peaks near 34% on the wettest days, and about 5 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 (%)	31	31	32	32	32	32	32	33	33	34	34	34	34	34	34	34	34	34	34	34	34	33	33	33	33	33	33	33	33	33	33
Snow chance (%)	11	12	13	14	14	15	16	16	17	17	17	17	17	17	17	17	16	16	16	16	16	16	16	16	16	16	16	16	16	17	17

	Rain chance (%)	Snow chance (%)
1	31	11
2	31	12
3	32	13
4	32	14
5	32	14
6	32	15
7	32	16
8	33	16
9	33	17
10	34	17
11	34	17
12	34	17
13	34	17
14	34	17
15	34	17
16	34	17
17	34	16
18	34	16
19	34	16
20	34	16
21	34	16
22	33	16
23	33	16
24	33	16
25	33	16
26	33	16
27	33	16
28	33	16
29	33	16
30	33	17
31	33	17

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 7 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)	7	7	7	7	7	7	7	7	7	7	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	7	light breeze
2	7	light breeze
3	7	light breeze
4	7	light breeze
5	7	light breeze
6	7	light breeze
7	7	light breeze
8	7	light breeze
9	7	light breeze
10	7	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 9 h 06 min at the start of December to 8 h 54 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 7:02 AM to 7:21 AM, and sunset from 4:09 PM to 4:17 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)	9.1	9.1	9.1	9.1	9.0	9.0	9.0	9.0	9.0	9.0	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9	8.9
Sunrise (AM)	7:02	7:03	7:04	7:05	7:06	7:07	7:08	7:09	7:10	7:10	7:11	7:12	7:13	7:14	7:14	7:15	7:16	7:16	7:17	7:17	7:18	7:18	7:19	7:19	7:20	7:20	7:20	7:21	7:21	7:21	7:21
Sunset (PM)	4:09	4:09	4:08	4:08	4:08	4:08	4:08	4:08	4:08	4:08	4:08	4:08	4:08	4:08	4:09	4:09	4:09	4:10	4:10	4:10	4:11	4:11	4:12	4:12	4:13	4:13	4:14	4:15	4:15	4:16	4:17

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	9.1	7:02	4:09
2	9.1	7:03	4:09
3	9.1	7:04	4:08
4	9.1	7:05	4:08
5	9.0	7:06	4:08
6	9.0	7:07	4:08
7	9.0	7:08	4:08
8	9.0	7:09	4:08
9	9.0	7:10	4:08
10	9.0	7:10	4:08
11	8.9	7:11	4:08
12	8.9	7:12	4:08
13	8.9	7:13	4:08
14	8.9	7:14	4:08
15	8.9	7:14	4:09
16	8.9	7:15	4:09
17	8.9	7:16	4:09
18	8.9	7:16	4:10
19	8.9	7:17	4:10
20	8.9	7:17	4:10
21	8.9	7:18	4:11
22	8.9	7:18	4:11
23	8.9	7:19	4:12
24	8.9	7:19	4:12
25	8.9	7:20	4:13
26	8.9	7:20	4:13
27	8.9	7:20	4:14
28	8.9	7:21	4:15
29	8.9	7:21	4:15
30	8.9	7:21	4:16
31	8.9	7:21	4:17

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.59 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.59 kWh/m² to a high of 5.88 kWh/m² in July across the year — December's 1.59 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)	1.7	1.7	1.7	1.7	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.6	1.7
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	1.7	Dim
2	1.7	Dim
3	1.7	Dim
4	1.7	Dim
5	1.6	Dim
6	1.6	Dim
7	1.6	Dim
8	1.6	Dim
9	1.6	Dim
10	1.6	Dim
11	1.6	Dim
12	1.6	Dim
13	1.6	Dim
14	1.6	Dim
15	1.6	Dim
16	1.6	Dim
17	1.6	Dim
18	1.6	Dim
19	1.6	Dim
20	1.6	Dim
21	1.6	Dim
22	1.6	Dim
23	1.6	Dim
24	1.6	Dim
25	1.6	Dim
26	1.6	Dim
27	1.6	Dim
28	1.6	Dim
29	1.6	Dim
30	1.6	Dim
31	1.7	Dim

Planning a trip in December

Hazard calendar for Acton

In seasonPeak

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

Acton sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is December a good time to visit Acton?

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

0.1

Sightseeing

10th-best month of the year

0.0

Beach & pool

9th-best month of the year

December is a weaker month for outdoor sightseeing in Acton.

What to pack for Acton in December

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

In December, Acton sees daytime highs around 40°F and nights near 26°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Acton in December

The nearest coast averages about 46°F in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 29 mi away) is warmest in August at about 66°F and coldest in February near 38°F.

The water stays below 68°F all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°F)	41	38	38	42	50	58	65	66	63	56	50	46
Comfort	Bracing	Bracing	Bracing	Bracing	Bracing	Bracing	Cool	Cool	Cool	Bracing	Bracing	Bracing

	Sea temperature (°F)	Comfort
Jan	41	Bracing
Feb	38	Bracing
Mar	38	Bracing
Apr	42	Bracing
May	50	Bracing
Jun	58	Bracing
Jul	65	Cool
Aug	66	Cool
Sep	63	Cool
Oct	56	Bracing
Nov	50	Bracing
Dec	46	Bracing

UV index in Acton 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 Acton peaks around July 10 at about 7 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 23 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	3	4	5	7	7	7	5	6	3	2	1
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Moderate	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	1	Low
Feb	3	Moderate
Mar	4	Moderate
Apr	5	High
May	7	Very high
Jun	7	Very high
Jul	7	Very high
Aug	5	Moderate
Sep	6	High
Oct	3	Moderate
Nov	2	Moderate
Dec	1	Low

Air quality in Acton 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 Acton is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 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)	9	13	13	13	14	13	16	14	11	9	8	9
Level	Good	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good

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

Location & terrain

Where is Acton?

Acton sits at 42.5°N, 71.4°W, 266 ft above sea level, in United States. The nearest listed city is Concord, 4.3 mi away.

Topography around Acton

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

Within 2 miles, the terrain around Acton has only modest variations in elevation — a maximum elevation change of 315 ft around an average of 236 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 574 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,176 ft.

The land around Acton is covered by trees (86%) within 2 miles, trees (84%) within 10 miles, and trees (77%) within 50 miles.

2 miles

315 ft

trees 86%

10 miles

574 ft

trees 84%

50 miles

3,176 ft

trees 77%

treesgrasslandcroplandartificial surfaceswaterwetland

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

December weather nearby: Concord 4.3 mi · Westford 6.2 mi · Sudbury 6.8 mi · Chelmsford 8.7 mi · Billerica 9.9 mi · Lexington 11 mi · Marlborough 11 mi · Lowell 12 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 Acton (42.4851°, -71.4328°, elevation 266 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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	44	30
2	44	30
3	44	29
4	43	29
5	43	29
6	42	28
7	42	28
8	42	28
9	41	27
10	41	27
11	40	27
12	40	26
13	40	26
14	40	26
15	39	26
16	39	26
17	39	25
18	39	25
19	39	25
20	39	25
21	38	25
22	38	24
23	38	24
24	38	24
25	38	24
26	38	24
27	38	24
28	37	23
29	37	23
30	37	23
31	37	23

	Clearer (%)	Cloudier (%)
1	48	52
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	47	53
9	47	53
10	45	55
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	45	55
17	45	55
18	46	54
19	46	54
20	46	54
21	46	54
22	46	54
23	47	53
24	48	52
25	49	51
26	49	51
27	49	51
28	50	50
29	50	50
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	31	11
2	31	12
3	32	13
4	32	14
5	32	14
6	32	15
7	32	16
8	33	16
9	33	17
10	34	17
11	34	17
12	34	17
13	34	17
14	34	17
15	34	17
16	34	17
17	34	16
18	34	16
19	34	16
20	34	16
21	34	16
22	33	16
23	33	16
24	33	16
25	33	16
26	33	16
27	33	16
28	33	16
29	33	16
30	33	17
31	33	17

	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	1.7	Dim
2	1.7	Dim
3	1.7	Dim
4	1.7	Dim
5	1.6	Dim
6	1.6	Dim
7	1.6	Dim
8	1.6	Dim
9	1.6	Dim
10	1.6	Dim
11	1.6	Dim
12	1.6	Dim
13	1.6	Dim
14	1.6	Dim
15	1.6	Dim
16	1.6	Dim
17	1.6	Dim
18	1.6	Dim
19	1.6	Dim
20	1.6	Dim
21	1.6	Dim
22	1.6	Dim
23	1.6	Dim
24	1.6	Dim
25	1.6	Dim
26	1.6	Dim
27	1.6	Dim
28	1.6	Dim
29	1.6	Dim
30	1.6	Dim
31	1.7	Dim

	Avg high (°F)	Avg low (°F)
1	44	30
2	44	30
3	44	29
4	43	29
5	43	29
6	42	28
7	42	28
8	42	28
9	41	27
10	41	27
11	40	27
12	40	26
13	40	26
14	40	26
15	39	26
16	39	26
17	39	25
18	39	25
19	39	25
20	39	25
21	38	25
22	38	24
23	38	24
24	38	24
25	38	24
26	38	24
27	38	24
28	37	23
29	37	23
30	37	23
31	37	23

	Clearer (%)	Cloudier (%)
1	48	52
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	47	53
9	47	53
10	45	55
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	45	55
17	45	55
18	46	54
19	46	54
20	46	54
21	46	54
22	46	54
23	47	53
24	48	52
25	49	51
26	49	51
27	49	51
28	50	50
29	50	50
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	31	11
2	31	12
3	32	13
4	32	14
5	32	14
6	32	15
7	32	16
8	33	16
9	33	17
10	34	17
11	34	17
12	34	17
13	34	17
14	34	17
15	34	17
16	34	17
17	34	16
18	34	16
19	34	16
20	34	16
21	34	16
22	33	16
23	33	16
24	33	16
25	33	16
26	33	16
27	33	16
28	33	16
29	33	16
30	33	17
31	33	17

	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	1.7	Dim
2	1.7	Dim
3	1.7	Dim
4	1.7	Dim
5	1.6	Dim
6	1.6	Dim
7	1.6	Dim
8	1.6	Dim
9	1.6	Dim
10	1.6	Dim
11	1.6	Dim
12	1.6	Dim
13	1.6	Dim
14	1.6	Dim
15	1.6	Dim
16	1.6	Dim
17	1.6	Dim
18	1.6	Dim
19	1.6	Dim
20	1.6	Dim
21	1.6	Dim
22	1.6	Dim
23	1.6	Dim
24	1.6	Dim
25	1.6	Dim
26	1.6	Dim
27	1.6	Dim
28	1.6	Dim
29	1.6	Dim
30	1.6	Dim
31	1.7	Dim

	Avg high (°F)	Avg low (°F)
1	44	30
2	44	30
3	44	29
4	43	29
5	43	29
6	42	28
7	42	28
8	42	28
9	41	27
10	41	27
11	40	27
12	40	26
13	40	26
14	40	26
15	39	26
16	39	26
17	39	25
18	39	25
19	39	25
20	39	25
21	38	25
22	38	24
23	38	24
24	38	24
25	38	24
26	38	24
27	38	24
28	37	23
29	37	23
30	37	23
31	37	23

	Clearer (%)	Cloudier (%)
1	48	52
2	47	53
3	47	53
4	47	53
5	47	53
6	47	53
7	47	53
8	47	53
9	47	53
10	45	55
11	45	55
12	45	55
13	45	55
14	46	54
15	46	54
16	45	55
17	45	55
18	46	54
19	46	54
20	46	54
21	46	54
22	46	54
23	47	53
24	48	52
25	49	51
26	49	51
27	49	51
28	50	50
29	50	50
30	50	50
31	50	50

	Rain chance (%)	Snow chance (%)
1	31	11
2	31	12
3	32	13
4	32	14
5	32	14
6	32	15
7	32	16
8	33	16
9	33	17
10	34	17
11	34	17
12	34	17
13	34	17
14	34	17
15	34	17
16	34	17
17	34	16
18	34	16
19	34	16
20	34	16
21	34	16
22	33	16
23	33	16
24	33	16
25	33	16
26	33	16
27	33	16
28	33	16
29	33	16
30	33	17
31	33	17

	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	1.7	Dim
2	1.7	Dim
3	1.7	Dim
4	1.7	Dim
5	1.6	Dim
6	1.6	Dim
7	1.6	Dim
8	1.6	Dim
9	1.6	Dim
10	1.6	Dim
11	1.6	Dim
12	1.6	Dim
13	1.6	Dim
14	1.6	Dim
15	1.6	Dim
16	1.6	Dim
17	1.6	Dim
18	1.6	Dim
19	1.6	Dim
20	1.6	Dim
21	1.6	Dim
22	1.6	Dim
23	1.6	Dim
24	1.6	Dim
25	1.6	Dim
26	1.6	Dim
27	1.6	Dim
28	1.6	Dim
29	1.6	Dim
30	1.6	Dim
31	1.7	Dim