Astoria weather in December: Astoria, Oregon: normal highs, lows, rain and records for December
Astoria in December has a normal high of 49°F and a normal low of 38°F, a daily mean of 43°F, falling from 50°F on the 1st to 48°F by the 31st. Measurable precipitation falls on 22 days in a normal December, 10.68 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 9°C and low of 3°C, 271 mm of precipitation in December.
- NOAA stationAstoria Regional Airport
- Station IDUSW00094224
- Location46.16°N 123.88°W
- Elevation9 ft (3 m)
- Population9,906
- Jan 49° 38°
- Feb 51° 37°
- Mar 53° 39°
- Apr 56° 42°
- May 61° 46°
- Jun 64° 51°
- Jul 67° 54°
- Aug 69° 54°
- Sep 68° 51°
- Oct 61° 45°
- Nov 54° 40°
- Dec 49° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Astoria in December?
The normal high is 49°F and the normal low 38°F, for a daily mean of 43.2°F. December is 3.7°F cooler than November and 0.5°F cooler than January. December is the 12th warmest month of the year in Astoria and the 2nd wettest. Across the month the normal high falls 2°F, from 50°F on December 1 to 48°F on December 31. From one year to the next December's mean temperature typically moves about 2.1°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 41°F and 45°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 72%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 50°F | 38°F | 71% | 56% |
| December 8 | 49°F | 38°F | 71% | 56% |
| December 15 | 48°F | 37°F | 72% | 56% |
| December 22 | 48°F | 37°F | 72% | 56% |
| December 31 | 48°F | 38°F | 72% | 56% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 13)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 50°F | 38°F | 71% | 56% | 9 h |
| December 2 | 50°F | 38°F | 71% | 56% | 8 h 50 min |
| December 3 | 50°F | 38°F | 71% | 55% | 8 h 50 min |
| December 4 | 50°F | 38°F | 71% | 55% | 8 h 50 min |
| December 5 | 50°F | 38°F | 71% | 55% | 8 h 50 min |
| December 6 | 49°F | 38°F | 71% | 55% | 8 h 50 min |
| December 7 | 49°F | 38°F | 71% | 55% | 8 h 50 min |
| December 8 | 49°F | 38°F | 71% | 56% | 8 h 50 min |
| December 9 | 49°F | 38°F | 72% | 56% | 8 h 40 min |
| December 10 | 49°F | 38°F | 72% | 56% | 8 h 40 min |
| December 11 | 49°F | 38°F | 72% | 56% | 8 h 40 min |
| December 12 | 49°F | 38°F | 72% | 56% | 8 h 40 min |
| December 13 | 49°F | 37°F | 72% | 56% | 8 h 40 min |
| December 14 | 49°F | 37°F | 72% | 56% | 8 h 40 min |
| December 15 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 16 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 17 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 18 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 19 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 20 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 21 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 22 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 23 | 48°F | 37°F | 72% | 56% | 8 h 40 min |
| December 24 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
| December 25 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
| December 26 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
| December 27 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
| December 28 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
| December 29 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
| December 30 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
| December 31 | 48°F | 38°F | 72% | 56% | 8 h 40 min |
- Normal high
- 49°FDecember average
- Normal low
- 38°FDecember average
- Precipitation
- 10.68 inmonth total
- Days with precipitation
- 220.01 inch or more
- Nights at 32°F or colder
- 7
- Daylight
- 9 h to 8 h 40 minDecember 1 to December 31
- Sunshine
- 52%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00094224; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Astoria in December?
On a given December day the chance of 0.01 inch or more is 72% on average, highest around December 18 (72%). In all, 10.68 in falls on 22 days of a normal December, 3 of them with an inch or more.
In a normal December in Astoria, 7 nights fall to freezing.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00094224.
How humid and windy is Astoria in December?
At 3 p.m. the normal temperature is 47°F with 76% relative humidity and a dew point of 39°F; at 6 a.m. it is 41°F with 85% humidity. The wind averages 8.7 mph, most often from the southeast in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 41°F | 37°F | 85% | 8.1 mph | – |
| 9 a.m. | 42°F | 37°F | 85% | 8.4 mph | – |
| noon | 46°F | 39°F | 78% | 9.8 mph | – |
| 3 p.m. | 47°F | 39°F | 76% | 10.0 mph | 33% |
| 6 p.m. | 44°F | 39°F | 82% | 8.3 mph | – |
| 9 p.m. | 43°F | 38°F | 84% | 8.3 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094224. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for December in Astoria?
The warmest December temperature on Astoria's official record (since 1887) is 65°F, on December 20, 2024; the coldest is 6°F, on December 8, 1972. The wettest December brought 36.07 in (1933); the snowiest, 19.0 inches (1964).
The December mean against the 1991-2020 normal of 43.2°F: 2021 40.8°F (−2.4), 2022 42.2°F (−1.0), 2023 47.4°F (+4.2), 2024 48.2°F (+5.0). 2 of 4 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 40.8°F | −2.4°F | 12.55 in |
| 2022 | 42.2°F | −1.0°F | 11.54 in |
| 2023 | 47.4°F | +4.2°F | 12.80 in |
| 2024 | 48.2°F | +5.0°F | 12.34 in |
Source: records: ACIS, NWS threaded record ASTthr; recent months: ACIS, station USW00094224. Records and recent months use complete months only.
How does December in Astoria compare across Oregon?
Across the 105 places PlainClimate covers in Oregon, December normal highs run from 33°F in Halfway to 55°F in Bandon; Astoria's is 49°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.