Westerly weather in December: Westerly, Rhode Island: normal highs, lows, rain and records for December
Westerly in December has a normal high of 45°F and a normal low of 30°F, a daily mean of 38°F, falling from 49°F on the 1st to 41°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 3.77 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 7°C and low of −1°C, 96 mm of precipitation in December.
- NOAA stationWesterly State Airport
- Station IDUSW00014794
- Location41.35°N 71.80°W
- Elevation81 ft (25 m)
- From the center2 miles
- Population (town)23,288
- Census place18,528
- Jan 40° 25°
- Feb 41° 26°
- Mar 47° 32°
- Apr 57° 41°
- May 67° 50°
- Jun 75° 59°
- Jul 82° 66°
- Aug 81° 64°
- Sep 74° 57°
- Oct 64° 47°
- Nov 54° 38°
- Dec 45° 30°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Westerly in December?
The normal high is 45°F and the normal low 30°F, for a daily mean of 37.6°F. December is 8.3°F cooler than November and 5.6°F warmer than January. December is the 10th warmest month of the year in Westerly and the 5th wettest. Across the month the normal high falls 8°F, from 49°F on December 1 to 41°F on December 31. From one year to the next December's mean temperature typically moves about 3.6°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 34°F and 41°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 49°F | 34°F | 35% | 22% |
| December 8 | 47°F | 32°F | 36% | 22% |
| December 15 | 45°F | 31°F | 36% | 22% |
| December 22 | 43°F | 29°F | 36% | 22% |
| December 31 | 41°F | 27°F | 36% | 22% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 49°F | 34°F | 35% | 22% | 9 h 30 min |
| December 2 | 49°F | 34°F | 35% | 22% | 9 h 20 min |
| December 3 | 48°F | 34°F | 35% | 22% | 9 h 20 min |
| December 4 | 48°F | 33°F | 36% | 22% | 9 h 20 min |
| December 5 | 48°F | 33°F | 36% | 22% | 9 h 20 min |
| December 6 | 48°F | 33°F | 36% | 22% | 9 h 20 min |
| December 7 | 47°F | 33°F | 36% | 22% | 9 h 20 min |
| December 8 | 47°F | 32°F | 36% | 22% | 9 h 20 min |
| December 9 | 47°F | 32°F | 36% | 22% | 9 h 20 min |
| December 10 | 46°F | 32°F | 36% | 22% | 9 h 20 min |
| December 11 | 46°F | 32°F | 36% | 22% | 9 h 20 min |
| December 12 | 46°F | 31°F | 36% | 22% | 9 h 10 min |
| December 13 | 46°F | 31°F | 36% | 22% | 9 h 10 min |
| December 14 | 45°F | 31°F | 36% | 22% | 9 h 10 min |
| December 15 | 45°F | 31°F | 36% | 22% | 9 h 10 min |
| December 16 | 45°F | 30°F | 36% | 22% | 9 h 10 min |
| December 17 | 45°F | 30°F | 36% | 22% | 9 h 10 min |
| December 18 | 44°F | 30°F | 36% | 22% | 9 h 10 min |
| December 19 | 44°F | 30°F | 36% | 22% | 9 h 10 min |
| December 20 | 44°F | 29°F | 36% | 22% | 9 h 10 min |
| December 21 | 44°F | 29°F | 36% | 22% | 9 h 10 min |
| December 22 | 43°F | 29°F | 36% | 22% | 9 h 10 min |
| December 23 | 43°F | 29°F | 36% | 22% | 9 h 10 min |
| December 24 | 43°F | 28°F | 36% | 22% | 9 h 10 min |
| December 25 | 43°F | 28°F | 36% | 22% | 9 h 10 min |
| December 26 | 42°F | 28°F | 36% | 22% | 9 h 10 min |
| December 27 | 42°F | 28°F | 36% | 22% | 9 h 10 min |
| December 28 | 42°F | 27°F | 36% | 22% | 9 h 10 min |
| December 29 | 42°F | 27°F | 36% | 22% | 9 h 10 min |
| December 30 | 42°F | 27°F | 36% | 22% | 9 h 10 min |
| December 31 | 41°F | 27°F | 36% | 22% | 9 h 10 min |
- Normal high
- 45°FDecember average
- Normal low
- 30°FDecember average
- Precipitation
- 3.77 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 22
- Daylight
- 9 h 30 min to 9 h 10 minDecember 1 to December 31
- Sunshine
- 67%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014794; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Westerly in December?
On a given December day the chance of 0.01 inch or more is 36% on average, highest around December 10 (36%). In all, 3.77 in falls on 11 days of a normal December, 1 of them with an inch or more.
In a normal December in Westerly, 22 nights fall to freezing and 4 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014794.
What are the records for December in Westerly?
The warmest December temperature on this station's record (since 1999) is 65°F, on December 25, 2015; the coldest is 4°F, on December 7, 2002. The wettest December brought 6.86 in (2024).
The December mean against the 1991-2020 normal of 37.6°F: 2021 40.1°F (+2.5), 2022 36.4°F (−1.3), 2023 41.1°F (+3.5), 2024 34.0°F (−3.6), 2025 31.7°F (−5.9). 2 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 40.1°F | +2.5°F | 1.08 in |
| 2022 | 36.4°F | −1.3°F | 4.87 in |
| 2023 | 41.1°F | +3.5°F | 5.06 in |
| 2024 | 34.0°F | −3.6°F | 6.86 in |
| 2025 | 31.7°F | −5.9°F | 1.76 in |
Source: records: ACIS, station USW00014794; recent months: ACIS, station USW00014794. Records and recent months use complete months only.
How does December in Westerly compare across Rhode Island?
Across the 6 places PlainClimate covers in Rhode Island, December normal highs run from 43°F in Kingston to 45°F in Westerly; Westerly's is 45°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.