Greenfield weather in December

In December, Greenfield sees average daytime highs of 38°F and overnight lows near 24°F, with 4.2 in of precipitation across 10.5 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 42°F in the first days to 35°F by the end. The sky is clear or mostly clear about 28% 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 Greenfield's 8th-clearest and 4th-windiest month. For the whole year in context, see Greenfield's year-round climate.

Daytime high
38°
10th warmest
Overnight low
24°
3rd coldest
Precipitation
4.2 in
10.5 wet days
Daylight
8 h 54 min
7:20 AM – 4:13 PM
Cloud cover
62%
8th clearest
Wind
7 mph
4th windiest
Solar energy
1.59 kWh/m²
Travel score
0.0
out of 10

Greenfield is city in Massachusetts, United States; county seat of Franklin County.

Founded
1686

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

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 42°F in the first days to 35°F by the end.

A typical December day in Greenfield reaches about 38°F in the afternoon and slips back to 24°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 50°F. Set against its neighbours, December runs about 10°F cooler than November and about 5°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14229
24228
34228
44128
54127
64027
74026
84026
93926
103925
113825
123824
133824
143824
153824
163724
173723
183723
193723
203723
213723
223723
233722
243622
253622
263622
273622
283622
293521
303521
313521

How December really feels in Greenfield

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
0
heat index over the day's high
Days feeling ≤ 32°F
31
9 feel bitter (≤ 14°F)

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

Greenfield 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.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 18°3.49.66.69.20.0
Feb36° / 19°3.08.96.310.30.0
Mar44° / 27°4.010.65.411.60.8
Apr57° / 38°3.711.11.513.13.8
May67° / 48°3.3110.114.46.0
Jun77° / 57°3.510.8015.16.6
Jul82° / 63°3.49.9014.86.4
Aug80° / 61°3.39.2013.76.7
Sep72° / 53°3.88.3012.36.9
Oct60° / 43°4.39.50.310.84.9
Nov48° / 33°3.59.71.79.61.8
Dec38° / 24°4.210.55.48.90.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34654
44555
54555
64555
74456
84357
94456
104357
114357
124258
134258
144159
154159
164159
174159
184159
194258
204258
214258
224357
234357
244456
254456
264357
274357
284456
294555
304555
314555

Chance of precipitation in December

Any precipitationSnow

Greenfield gets around 4.2 in of rain and snow over 10.5 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 34% and peaks near 35% on the wettest days, and about 5 days bring snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
13312
23313
33314
43314
53415
63416
73416
83517
93518
103518
113519
123519
133519
143519
153518
163518
173418
183418
193417
203317
213317
223317
233317
243217
253217
263217
273217
283218
293318
303319
313319

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.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 7 mph in December.

Across December, daily wind ranges from about 7 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

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 7:07 AM to 7:26 AM, and sunset from 4:13 PM to 4:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.17:074:13
29.17:084:13
39.17:094:13
49.07:104:13
59.07:114:12
69.07:124:12
79.07:134:12
89.07:144:12
99.07:154:12
108.97:154:12
118.97:164:12
128.97:174:12
138.97:184:13
148.97:194:13
158.97:194:13
168.97:204:13
178.97:214:13
188.97:214:14
198.97:224:14
208.97:224:15
218.97:234:15
228.97:234:15
238.97:244:16
248.97:244:16
258.97:254:17
268.97:254:18
278.97:254:18
288.97:264:19
298.97:264:20
308.97:264:20
318.97:264:21

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 5.92 kWh/m² in July across the year — December's 1.59 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.7Dim
21.7Dim
31.7Dim
41.6Dim
51.6Dim
61.6Dim
71.6Dim
81.6Dim
91.6Dim
101.6Dim
111.6Dim
121.6Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.6Dim
221.6Dim
231.6Dim
241.6Dim
251.6Dim
261.6Dim
271.6Dim
281.6Dim
291.6Dim
301.6Dim
311.6Dim
Planning a trip in December

Is December a good time to visit Greenfield?

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

0.0
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 Greenfield.

What to pack for Greenfield in December

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

In December, Greenfield sees daytime highs around 38°F and nights near 24°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 11 days see rain.

a warm layera heavy coatrain gear

UV index in Greenfield 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 Greenfield peaks around July 11 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 11UV 7Dec 23UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar4Moderate
Apr5High
May7Very high
Jun7Very high
Jul8Very high
Aug5High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low
Location & terrain

Where is Greenfield?

Greenfield sits at 42.6°N, 72.6°W, 240 ft above sea level, in United States. The nearest listed city is Amherst Center, 15 mi away.

Topography around Greenfield

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

Within 2 miles, the terrain around Greenfield has only modest variations in elevation — a maximum elevation change of 627 ft around an average of 256 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,785 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,934 ft.

The land around Greenfield is covered by trees (65%) within 2 miles, trees (84%) within 10 miles, and trees (92%) within 50 miles.

2 miles
627 ft
10 miles
1,785 ft
50 miles
3,934 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Amherst Center 15 mi · Amherst 16 mi · Northampton 18 mi · Easthampton 22 mi · South Hadley 23 mi · Holyoke 27 mi · North Chicopee 28 mi · Keene 29 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
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

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 Greenfield (42.5876°, -72.5995°, elevation 240 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).