Astoria, Oregon climate: Normal weather by month, frost dates and records
Astoria's normal year runs from 38°F December nights to 69°F August afternoons, with 70.3 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.8°C, December lows of 3°C, August highs of 20°C, 1,785 mm of precipitation a year.
- NOAA stationAstoria Regional Airport
- Station IDUSW00094224
- Location46.16°N 123.88°W
- Elevation9 ft (3 m)
- Population9,906
On October 23, the normal high in Astoria is 59°F and the normal low 44°F, and the chance of measurable rain or snow is 58%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Astoria.
- 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.
What is the weather like in Astoria each month?
August is the warmest month, with normal highs of 69°F; December the coldest, with normal lows of 38°F. The most precipitation falls in November (11.05 in), the least in July (0.83 in).
Each month has its own page with the day-by-day normals, the month's records and its recent years:
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 49°F | 38°F | 43.7°F | 10.59 | 22 | <1 | 6 | 9 h |
| February | 51°F | 37°F | 44.2°F | 7.18 | 19 | <1 | 7 | 10 h 20 min |
| March | 53°F | 39°F | 46.0°F | 7.90 | 22 | <1 | 4 | 11 h 50 min |
| April | 56°F | 42°F | 48.7°F | 5.80 | 19 | <1 | 1 | 13 h 30 min |
| May | 61°F | 46°F | 53.4°F | 3.40 | 16 | <1 | <1 | 15 h |
| June | 64°F | 51°F | 57.3°F | 2.30 | 14 | <1 | <1 | 15 h 40 min |
| July | 67°F | 54°F | 60.6°F | 0.83 | 8 | <1 | <1 | 15 h 30 min |
| August | 69°F | 54°F | 61.3°F | 1.12 | 8 | <1 | <1 | 14 h 10 min |
| September | 68°F | 51°F | 59.0°F | 2.67 | 10 | <1 | <1 | 12 h 40 min |
| October | 61°F | 45°F | 52.8°F | 6.74 | 17 | <1 | 1 | 11 h |
| November | 54°F | 40°F | 46.9°F | 11.05 | 21 | <1 | 4 | 9 h 30 min |
| December | 49°F | 38°F | 43.2°F | 10.68 | 22 | <1 | 7 | 8 h 40 min |
| Year (annual) | 58°F | 45°F | 51.4°F | 70.26 | 196 | 1 | 29 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 10°C | 3°C | 6.5°C | 269 mm |
| February | 11°C | 3°C | 6.8°C | 182 mm |
| March | 12°C | 4°C | 7.8°C | 201 mm |
| April | 13°C | 5°C | 9.3°C | 147 mm |
| May | 16°C | 8°C | 11.9°C | 86 mm |
| June | 18°C | 10°C | 14.1°C | 58 mm |
| July | 20°C | 12°C | 15.9°C | 21 mm |
| August | 20°C | 12°C | 16.3°C | 28 mm |
| September | 20°C | 10°C | 15.0°C | 68 mm |
| October | 16°C | 7°C | 11.6°C | 171 mm |
| November | 12°C | 5°C | 8.3°C | 281 mm |
| December | 9°C | 3°C | 6.2°C | 271 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Seaside (12 miles away), gets 0 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094224; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Astoria?
Normal highs sit between 65°F and 85°F in July, August and September. Of those, August has the fewest days with rain (8).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094224.
When is the last frost in Astoria?
In Astoria, the last spring frost (32°F) comes after March 26 in half of years and after April 18 in one year in ten; the first autumn frost comes before November 11 in half of years and before October 22 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- March 261 year in 10 after April 18; 9 in 10 after February 27
- First autumn frost, half of years before
- November 111 year in 10 before October 22; 9 in 10 before December 8
NOAA puts the median frost-free season at 232 days, and the season without a hard freeze (28°F) at 299 days.
A hard freeze (28°F) comes after February 18 in half of springs and before December 5 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Astoria in zone 9a in ZIP code 97146, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Astoria's NOAA station is in zone 9a: the coldest night of a typical year reaches 23°F (30 complete years).
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00094224; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Astoria?
In a normal year in Astoria, 1 day a year reaches 90°F, 29 nights fall to 32°F or colder and 196 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 29a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 196a normal year
The highest temperature in Astoria's official record (kept by the National Weather Service since 1887) is 101°F, on June 27, 2021; the lowest is 6°F, on December 8, 1972.
The wettest calendar year on that record is 1933, with 114.03 in; the snowiest season is 1968–69, with 31.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00094224; records: ACIS (NOAA Regional Climate Centers), NWS threaded record ASTthr. Records use complete months only; a month missing more than three days is left out.
How humid and windy is Astoria, and how clear are its skies?
The summer (June-August) dew point averages 54°F. The muggiest month is July, with an average dew point of 55°F; the driest air comes in December (38°F). December is the windiest month (8.7 mph on average), and August has the most clear or nearly clear hours (54%).
| Month | Dew point | Humidity | Afternoon humidity | Wind | Clear or few clouds | Overcast |
|---|---|---|---|---|---|---|
| January | 39°F | 82% | 72% | 8.0 mph | 32% | 55% |
| February | 39°F | 81% | 68% | 7.7 mph | 35% | 47% |
| March | 41°F | 80% | 67% | 7.7 mph | 29% | 51% |
| April | 45°F | 79% | 66% | 7.8 mph | 38% | 40% |
| May | 49°F | 81% | 69% | 7.6 mph | 28% | 56% |
| June | 53°F | 80% | 68% | 7.7 mph | 36% | 52% |
| July | 55°F | 82% | 69% | 7.8 mph | 48% | 40% |
| August | 54°F | 82% | 66% | 6.9 mph | 54% | 28% |
| September | 51°F | 82% | 67% | 6.5 mph | 50% | 36% |
| October | 45°F | 84% | 72% | 7.1 mph | 36% | 49% |
| November | 39°F | 83% | 75% | 8.1 mph | 35% | 49% |
| December | 38°F | 83% | 76% | 8.7 mph | 30% | 55% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00094224. Monthly averages of all hours; afternoon humidity at 3 p.m. local standard time; sky as the share of hours NOAA's observations rate clear or few clouds (a dash where NOAA publishes no sky value).
How sunny is Astoria?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Astoria, 3.5 kWh per square metre a day. July is the sunniest month (78%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 52% | 1.1 |
| February | 59% | 2.0 |
| March | 57% | 2.9 |
| April | 62% | 4.2 |
| May | 66% | 5.2 |
| June | 67% | 5.7 |
| July | 78% | 6.4 |
| August | 78% | 5.4 |
| September | 75% | 4.0 |
| October | 65% | 2.4 |
| November | 55% | 1.3 |
| December | 52% | 0.9 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Astoria need?
A normal year in Astoria brings 4,960 heating degree days, 8% fewer than the median U.S. place (5,373), and 22 cooling degree days, 98% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 1,494 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 659 | 0 |
| February | 584 | 0 |
| March | 589 | 0 |
| April | 489 | 0 |
| May | 361 | 2 |
| June | 233 | 2 |
| July | 140 | 5 |
| August | 122 | 7 |
| September | 185 | 6 |
| October | 379 | 0 |
| November | 543 | 0 |
| December | 677 | 0 |
| Year (annual) | 4,960 | 22 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00094224. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Astoria been warmer than normal lately?
2024 averaged 53.6°F, 2.2°F above the 1991-2020 normal of 51.4°F. 3 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 51.3°F | −0.1°F | 77.02 |
| 2022 | 51.7°F | +0.3°F | 72.10 |
| 2023 | 52.2°F | +0.8°F | 62.23 |
| 2024 | 53.6°F | +2.2°F | 74.49 |
Over 127 complete years from 1867 to 2025, the station's annual mean temperature rose at a fitted 1.5°F per century (+0.08°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00094224; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Astoria's climate compare?
Astoria is warmer than 45 of the other 104 places with their own NOAA record in Oregon, and wetter than 82. Across the 7,247 U.S. stations with normals, its annual mean of 51.4°F is warmer than 47%.
In the Köppen classification computed from these normals, Astoria is Csb: temperate, dry-summer, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Astoria share this climate record?
6 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Warrenton, OR6,324 people · 3 mi NW
- Ilwaco, WA1,112 people · 13 mi NW
- Chinook, WA557 people · 9 mi N
- Rosburg, WA468 people · 15 mi NE
- Jeffers Gardens, OR201 people · 1 mi E
- Altoona, WA46 people · 15 mi NE
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Astoria's climate
What is the coldest month in Astoria?
December, with a normal high of 49°F and a normal low of 38°F. The warmest is August (69°F by day, 54°F at night).
Does it snow in Astoria?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Astoria's NOAA station; the nearest record that keeps one, Seaside (12 miles away), records 0 inches of snow in a normal year.
What is the rainiest month in Astoria?
November, with 11.05 in of precipitation in a normal year; the driest is July with 0.83 in.
What plant hardiness zone is Astoria in?
The USDA's 2023 map puts Astoria in zone 9a in ZIP code 97146, the nearest ZIP area. By the same method at Astoria's NOAA station, the coldest night of a typical year reaches 23°F (30 years, 1991-2020): zone 9a.
How late can frost come in Astoria?
In half of years the last 32°F night comes after March 26; in one year in ten it comes after April 18. Waiting until April 18 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Astoria in OctoberThis month day by day, its records and recent years
- Oregon climateThe statewide normals and every place in the state
- Fort Clatsop National Mem, OR1 miles from this station, 51.8°F a year
- Seaside, OR12 miles from this station, 51.7°F a year
- Naselle, WA16 miles from this station, 50.7°F a year
- Long Beach, WA16 miles from this station, 49.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made