Fort Clatsop National Mem, Oregon climate: Climate normals at a NOAA weather station
Fort Clatsop National Mem's normal year runs from 37°F December nights to 71°F August afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.0°C, December lows of 3°C, August highs of 22°C.
- NOAA stationFort Clatsop National Mem
- Station IDUSC00353014
- Location46.14°N 123.88°W
- Elevation42 ft (13 m)
On October 23, the normal high in Fort Clatsop National Mem is 59°F and the normal low 44°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Fort Clatsop National Mem.
- Jan 49° 38°
- Feb 51° 37°
- Mar 54° 39°
- Apr 58° 41°
- May 64° 45°
- Jun 67° 49°
- Jul 70° 53°
- Aug 71° 53°
- Sep 70° 49°
- Oct 61° 45°
- Nov 53° 40°
- Dec 49° 37°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Fort Clatsop National Mem each month?
August is the warmest month, with normal highs of 71°F; December the coldest, with normal lows of 37°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 49°F | 38°F | 43.3°F | – | <1 | 7 | 9 h |
| February | 51°F | 37°F | 44.3°F | – | <1 | 6 | 10 h 20 min |
| March | 54°F | 39°F | 46.5°F | – | <1 | 4 | 11 h 50 min |
| April | 58°F | 41°F | 49.4°F | – | <1 | 2 | 13 h 30 min |
| May | 64°F | 45°F | 54.5°F | – | <1 | <1 | 15 h |
| June | 67°F | 49°F | 57.8°F | – | <1 | <1 | 15 h 40 min |
| July | 70°F | 53°F | 61.6°F | – | <1 | <1 | 15 h 30 min |
| August | 71°F | 53°F | 62.1°F | – | 1 | <1 | 14 h 10 min |
| September | 70°F | 49°F | 59.5°F | – | <1 | <1 | 12 h 40 min |
| October | 61°F | 45°F | 53.1°F | – | <1 | 1 | 11 h |
| November | 53°F | 40°F | 46.5°F | – | <1 | 4 | 9 h 30 min |
| December | 49°F | 37°F | 42.9°F | – | <1 | 7 | 8 h 40 min |
| Year (annual) | 60°F | 44°F | 51.8°F | – | 1 | 31 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 9°C | 3°C | 6.3°C |
| February | 11°C | 3°C | 6.8°C |
| March | 12°C | 4°C | 8.1°C |
| April | 15°C | 5°C | 9.7°C |
| May | 18°C | 7°C | 12.5°C |
| June | 19°C | 10°C | 14.3°C |
| July | 21°C | 12°C | 16.4°C |
| August | 22°C | 12°C | 16.7°C |
| September | 21°C | 10°C | 15.3°C |
| October | 16°C | 7°C | 11.7°C |
| November | 12°C | 5°C | 8.1°C |
| December | 9°C | 3°C | 6.1°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Seaside (11 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 USC00353014; 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.
Which months are mildest at Fort Clatsop National Mem?
Normal highs sit between 65°F and 85°F in June, July, August and September.
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 USC00353014.
When is the last frost at Fort Clatsop National Mem?
In Fort Clatsop National Mem, the last spring frost (32°F) comes after March 30 in half of years and after April 28 in one year in ten; the first autumn frost comes before November 18 in half of years and before October 27 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 301 year in 10 after April 28; 9 in 10 after February 26
- First autumn frost, half of years before
- November 181 year in 10 before October 27; 9 in 10 before December 16
NOAA puts the median frost-free season at 233 days, and the season without a hard freeze (28°F) at 312 days.
A hard freeze (28°F) comes after February 12 in half of springs and before December 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Fort Clatsop National Mem in zone 9a in ZIP code 97146, the nearest ZIP area.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00353014; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. 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 at Fort Clatsop National Mem?
In a normal year in Fort Clatsop National Mem, 1 day a year reaches 90°F and 31 nights fall to 32°F or colder.
- 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
- 31a normal year
- Days that stay below freezing
- 1high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00353014.
How sunny is it at Fort Clatsop National Mem?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds at Fort Clatsop National Mem, 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 many heating and cooling degree days does Fort Clatsop National Mem record?
A normal year at Fort Clatsop National Mem brings 4,844 heating degree days, 10% fewer than the median U.S. place (5,373), and 38 cooling degree days, 96% 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 1,614 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 673 | 0 |
| February | 581 | 0 |
| March | 575 | 0 |
| April | 467 | 0 |
| May | 329 | 3 |
| June | 220 | 4 |
| July | 118 | 12 |
| August | 105 | 13 |
| September | 171 | 6 |
| October | 369 | 0 |
| November | 554 | 0 |
| December | 685 | 0 |
| Year (annual) | 4,844 | 38 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00353014. 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.
How does Fort Clatsop National Mem's climate compare?
Fort Clatsop National Mem is warmer than 51 of the 105 places with their own NOAA record in Oregon. Across the 7,247 U.S. stations with normals, its annual mean of 51.8°F is warmer than 49%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Fort Clatsop National Mem share this climate record?
River Point has no NOAA station with 1991-2020 normals of its 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.
- River Point, OR308 people · 4 mi E
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 Fort Clatsop National Mem's climate
What is the coldest month at Fort Clatsop National Mem?
December, with a normal high of 49°F and a normal low of 37°F. The warmest is August (71°F by day, 53°F at night).
Does it snow at Fort Clatsop National Mem?
Rarely. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Seaside (11 miles away), records 0 inches of snow in a normal year.
What plant hardiness zone is Fort Clatsop National Mem in?
The USDA's 2023 map puts Fort Clatsop National Mem in zone 9a in ZIP code 97146, the nearest ZIP area.
How late can frost come at Fort Clatsop National Mem?
In half of years the last 32°F night comes after March 30; in one year in ten it comes after April 28. Waiting until April 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Astoria, OR1 miles from this station, 51.4°F a year
- Seaside, OR11 miles from this station, 51.7°F a year
- Naselle, WA17 miles from this station, 50.7°F a year
- Long Beach, WA18 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