Clatskanie, Oregon climate: Normal weather by month, frost dates and records
Clatskanie's normal year runs from 33°F December nights to 76°F August afternoons, with 54.7 inches of precipitation and 2 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.4°C, December lows of 0°C, August highs of 24°C, 1,388 mm of precipitation a year.
- NOAA stationClatskanie
- Station IDUSC00351643
- Location46.11°N 123.21°W
- Elevation22 ft (7 m)
- Population1,782
On October 23, the normal high in Clatskanie is 59°F and the normal low 40°F, and the chance of measurable rain or snow is 62%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Clatskanie.
- Jan 47° 33°
- Feb 50° 33°
- Mar 55° 35°
- Apr 59° 38°
- May 65° 44°
- Jun 69° 49°
- Jul 75° 52°
- Aug 76° 52°
- Sep 72° 48°
- Oct 62° 41°
- Nov 52° 36°
- Dec 46° 33°
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 Clatskanie each month?
August is the warmest month, with normal highs of 76°F; December the coldest, with normal lows of 33°F. The most precipitation falls in December (9.38 in), the least in July (0.59 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 47°F | 33°F | 39.8°F | 8.31 | 0.5 | 22 | <1 | 14 | 9 h |
| February | 50°F | 33°F | 41.5°F | 5.72 | 0.7 | 19 | <1 | 14 | 10 h 20 min |
| March | 55°F | 35°F | 44.9°F | 6.09 | 0.2 | 22 | <1 | 10 | 11 h 50 min |
| April | 59°F | 38°F | 48.6°F | 4.28 | 0.0 | 20 | <1 | 4 | 13 h 30 min |
| May | 65°F | 44°F | 54.4°F | 2.68 | 0.0 | 14 | <1 | 1 | 15 h |
| June | 69°F | 49°F | 58.6°F | 1.73 | 0.0 | 12 | 1 | <1 | 15 h 40 min |
| July | 75°F | 52°F | 63.5°F | 0.59 | 0.0 | 6 | 1 | <1 | 15 h 30 min |
| August | 76°F | 52°F | 64.0°F | 0.67 | 0.0 | 5 | 1 | <1 | 14 h 10 min |
| September | 72°F | 48°F | 59.8°F | 2.06 | 0.0 | 9 | <1 | <1 | 12 h 40 min |
| October | 62°F | 41°F | 51.3°F | 4.54 | 0.0 | 18 | <1 | 3 | 11 h |
| November | 52°F | 36°F | 43.9°F | 8.61 | 0.1 | 23 | <1 | 10 | 9 h 30 min |
| December | 46°F | 33°F | 39.3°F | 9.38 | 0.8 | 23 | <1 | 14 | 8 h 40 min |
| Year (annual) | 61°F | 41°F | 50.8°F | 54.66 | 2.3 | 192 | 4 | 70 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | 1°C | 4.3°C | 211 mm | 1 cm |
| February | 10°C | 0°C | 5.3°C | 145 mm | 2 cm |
| March | 13°C | 2°C | 7.2°C | 155 mm | 1 cm |
| April | 15°C | 3°C | 9.2°C | 109 mm | 0 cm |
| May | 18°C | 7°C | 12.4°C | 68 mm | 0 cm |
| June | 20°C | 9°C | 14.8°C | 44 mm | 0 cm |
| July | 24°C | 11°C | 17.5°C | 15 mm | 0 cm |
| August | 24°C | 11°C | 17.8°C | 17 mm | 0 cm |
| September | 22°C | 9°C | 15.4°C | 52 mm | 0 cm |
| October | 16°C | 5°C | 10.7°C | 115 mm | 0 cm |
| November | 11°C | 2°C | 6.6°C | 219 mm | 0 cm |
| December | 8°C | 0°C | 4.1°C | 238 mm | 2 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00351643; 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 Clatskanie?
Normal highs sit between 65°F and 85°F in June, July, August and September. Of those, August has the fewest days with rain (5).
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 USC00351643.
When is the last frost in Clatskanie?
In Clatskanie, the last spring frost (32°F) comes after April 24 in half of years and after May 9 in one year in ten; the first autumn frost comes before October 24 in half of years and before October 5 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
- April 241 year in 10 after May 9; 9 in 10 after March 31
- First autumn frost, half of years before
- October 241 year in 10 before October 5; 9 in 10 before November 12
NOAA puts the median frost-free season at 184 days, and the season without a hard freeze (28°F) at 232 days.
A hard freeze (28°F) comes after March 25 in half of springs and before November 9 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Clatskanie in zone 8b in ZIP code 97016, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Clatskanie's NOAA station is in zone 8b: the coldest night of a typical year reaches 17°F (29 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 USC00351643; 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 Clatskanie?
In a normal year in Clatskanie, 4 days a year reach 90°F, 70 nights fall to 32°F or colder and 192 days bring measurable precipitation.
- Days at 90°F or more
- 4a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 70a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 192a normal year
- Days with 1 inch of snow or more
- 1a normal year
The highest temperature in this station's record (since 1935) is 103°F, on June 28, 2021; the lowest is 1°F, on February 4, 1989.
The wettest calendar year on that record is 1937, with 76.78 in; the snowiest season is 1949–50, with 72.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00351643; records: ACIS (NOAA Regional Climate Centers), station USC00351643. Records use complete months only; a month missing more than three days is left out.
How sunny is Clatskanie?
Over a year 67% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Clatskanie, 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 Clatskanie need?
A normal year in Clatskanie brings 5,268 heating degree days, 2% fewer than the median U.S. place (5,373), and 105 cooling degree days, 88% 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 1,724 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 781 | 0 |
| February | 657 | 0 |
| March | 623 | 0 |
| April | 494 | 0 |
| May | 332 | 3 |
| June | 201 | 11 |
| July | 87 | 39 |
| August | 72 | 41 |
| September | 168 | 12 |
| October | 423 | 0 |
| November | 633 | 0 |
| December | 798 | 0 |
| Year (annual) | 5,268 | 105 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00351643. 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 Clatskanie been warmer than normal lately?
2024 averaged 51.8°F, 1.0°F above the 1991-2020 normal of 50.8°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 51.3°F | +0.5°F | – | 17.0 |
| 2022 | 51.3°F | +0.5°F | 52.71 | 2.0 |
| 2023 | 51.7°F | +0.9°F | 44.28 | 0.0 |
| 2024 | 51.8°F | +1.0°F | 56.05 | 7.3 |
Over 81 complete years from 1936 to 2024, the station's annual mean temperature rose at a fitted 0.6°F per century (+0.03°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00351643; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Clatskanie's climate compare?
Clatskanie is warmer than 42 of the other 104 places with their own NOAA record in Oregon, and wetter than 71. Across the 7,247 U.S. stations with normals, its annual mean of 50.8°F is warmer than 44%.
In the Köppen classification computed from these normals, Clatskanie 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 Clatskanie share this climate record?
8 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.
- Puget Island, WA1,136 people · 10 mi NW
- East Cathlamet, WA667 people · 10 mi NW
- Cathlamet, WA608 people · 11 mi NW
- Ryderwood, WA367 people · 20 mi NE
- Skamokawa Valley, WA311 people · 17 mi NW
- Westport, OR260 people · 8 mi W
- Lower Elochoman, WA235 people · 11 mi NW
- Upper Elochoman, WA94 people · 11 mi NW
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 Clatskanie's climate
What is the coldest month in Clatskanie?
December, with a normal high of 46°F and a normal low of 33°F. The warmest is August (76°F by day, 52°F at night).
Does it snow in Clatskanie?
Yes: 2 inches in a normal year, falling on 2 days with 0.1 inch or more, the most in December (0.8 inches).
What is the rainiest month in Clatskanie?
December, with 9.38 in of precipitation in a normal year; the driest is July with 0.59 in.
What plant hardiness zone is Clatskanie in?
The USDA's 2023 map puts Clatskanie in zone 8b in ZIP code 97016, the nearest ZIP area. By the same method at Clatskanie's NOAA station, the coldest night of a typical year reaches 17°F (29 years, 1991-2020): zone 8b.
How late can frost come in Clatskanie?
In half of years the last 32°F night comes after April 24; in one year in ten it comes after May 9. Waiting until May 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Longview, WA14 miles from this station, 53.2°F a year
- Vernonia, OR17 miles from this station, 49.4°F a year
- St. Helens, OR24 miles from this station, 51.6°F a year
- Grays River Hatchery, WA25 miles from this station, 51.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made