Tillamook, Oregon climate: Normal weather by month, frost dates and records
Tillamook's normal year runs from 36°F December nights to 69°F August afternoons, with 89.8 inches of precipitation and less than an inch of snow (0.2 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.6°C, December lows of 2°C, August highs of 21°C, 2,282 mm of precipitation a year.
- NOAA stationTillamook
- Station IDUSC00358494
- Location45.45°N 123.85°W
- Elevation12 ft (4 m)
- Population5,157
On October 23, the normal high in Tillamook is 61°F and the normal low 42°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 Tillamook.
- Jan 52° 37°
- Feb 53° 36°
- Mar 55° 37°
- Apr 57° 39°
- May 61° 44°
- Jun 64° 48°
- Jul 68° 50°
- Aug 69° 50°
- Sep 68° 47°
- Oct 63° 43°
- Nov 56° 39°
- Dec 51° 36°
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 Tillamook each month?
August is the warmest month, with normal highs of 69°F; December the coldest, with normal lows of 36°F. The most precipitation falls in December (14.65 in), the least in July (0.92 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 52°F | 37°F | 44.5°F | 13.38 | 22 | <1 | 9 | 9 h |
| February | 53°F | 36°F | 44.7°F | 9.49 | 19 | <1 | 9 | 10 h 20 min |
| March | 55°F | 37°F | 46.0°F | 10.05 | 22 | <1 | 8 | 11 h 50 min |
| April | 57°F | 39°F | 48.3°F | 7.48 | 20 | <1 | 3 | 13 h 30 min |
| May | 61°F | 44°F | 52.4°F | 4.56 | 15 | <1 | 1 | 14 h 50 min |
| June | 64°F | 48°F | 55.9°F | 3.28 | 13 | <1 | <1 | 15 h 40 min |
| July | 68°F | 50°F | 59.0°F | 0.92 | 6 | <1 | <1 | 15 h 20 min |
| August | 69°F | 50°F | 59.7°F | 1.20 | 7 | <1 | <1 | 14 h 10 min |
| September | 68°F | 47°F | 57.6°F | 3.58 | 10 | <1 | <1 | 12 h 40 min |
| October | 63°F | 43°F | 52.6°F | 7.80 | 18 | <1 | 2 | 11 h |
| November | 56°F | 39°F | 47.2°F | 13.44 | 23 | <1 | 7 | 9 h 30 min |
| December | 51°F | 36°F | 43.5°F | 14.65 | 23 | <1 | 9 | 8 h 40 min |
| Year (annual) | 60°F | 42°F | 51.0°F | 89.83 | 197 | <1 | 47 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 11°C | 3°C | 6.9°C | 340 mm |
| February | 12°C | 2°C | 7.1°C | 241 mm |
| March | 13°C | 3°C | 7.8°C | 255 mm |
| April | 14°C | 4°C | 9.1°C | 190 mm |
| May | 16°C | 7°C | 11.3°C | 116 mm |
| June | 18°C | 9°C | 13.3°C | 83 mm |
| July | 20°C | 10°C | 15.0°C | 23 mm |
| August | 21°C | 10°C | 15.4°C | 30 mm |
| September | 20°C | 8°C | 14.2°C | 91 mm |
| October | 17°C | 6°C | 11.4°C | 198 mm |
| November | 13°C | 4°C | 8.4°C | 341 mm |
| December | 10°C | 2°C | 6.4°C | 372 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00358494; 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 Tillamook?
Normal highs sit between 65°F and 85°F in July, August and September. Of those, July has the fewest days with rain (6).
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 USC00358494.
When is the last frost in Tillamook?
In Tillamook, the last spring frost (32°F) comes after April 22 in half of years and after May 13 in one year in ten; the first autumn frost comes before October 21 in half of years and before September 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
- April 221 year in 10 after May 13; 9 in 10 after March 28
- First autumn frost, half of years before
- October 211 year in 10 before September 27; 9 in 10 before November 15
NOAA puts the median frost-free season at 183 days, and the season without a hard freeze (28°F) at 236 days.
A hard freeze (28°F) comes after March 22 in half of springs and before November 15 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Tillamook in zone 9a in ZIP code 97141, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Tillamook's NOAA station is in zone 8b: the coldest night of a typical year reaches 20°F (24 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Oregon · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00358494; 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 Tillamook?
In a normal year in Tillamook, a 90°F day is rare, 47 nights fall to 32°F or colder and 197 days bring measurable precipitation.
- Days at 90°F or more
- fewer than 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 47a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 197a normal year
The highest temperature in this station's record (since 1948) is 97°F, on September 14, 1979; the lowest is 1°F, on January 31, 1950.
The wettest calendar year on that record is 1996, with 122.71 in; the snowiest season is 1950–51, with 19.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00358494; records: ACIS (NOAA Regional Climate Centers), station USC00358494. Records use complete months only; a month missing more than three days is left out.
How sunny is Tillamook?
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Tillamook, 3.7 kWh per square metre a day. July is the sunniest month (83%) and December the cloudiest (52%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 54% | 1.2 |
| February | 60% | 2.1 |
| March | 59% | 3.0 |
| April | 63% | 4.3 |
| May | 68% | 5.4 |
| June | 70% | 6.0 |
| July | 83% | 6.8 |
| August | 83% | 5.8 |
| September | 78% | 4.3 |
| October | 67% | 2.6 |
| November | 56% | 1.4 |
| December | 52% | 1.0 |
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 Tillamook need?
A normal year in Tillamook brings 5,124 heating degree days, 5% fewer than the median U.S. place (5,373), and 10 cooling degree days, 99% 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 1,314 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 634 | 0 |
| February | 568 | 0 |
| March | 589 | 0 |
| April | 501 | 0 |
| May | 392 | 1 |
| June | 274 | 1 |
| July | 188 | 2 |
| August | 169 | 3 |
| September | 226 | 4 |
| October | 385 | 0 |
| November | 533 | 0 |
| December | 666 | 0 |
| Year (annual) | 5,124 | 10 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00358494. 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 Tillamook been warmer than normal lately?
Over 69 complete years from 1898 to 2018, the station's annual mean temperature rose at a fitted 2.1°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Tillamook's climate compare?
Tillamook is warmer than 44 of the other 104 places with their own NOAA record in Oregon, and wetter than 94. Across the 7,247 U.S. stations with normals, its annual mean of 51.0°F is warmer than 45%.
In the Köppen classification computed from these normals, Tillamook 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 Tillamook share this climate record?
14 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.
- Rockaway Beach, OR1,441 people · 12 mi N
- Bay City, OR1,381 people · 5 mi N
- Bayside Gardens, OR1,194 people · 18 mi N
- Garibaldi, OR817 people · 8 mi N
- Netarts, OR805 people · 4 mi W
- Manzanita, OR639 people · 19 mi N
- Pleasant Valley, OR589 people · 6 mi SE
- Fairview, OR523 people · 3 mi E
- Wheeler, OR424 people · 16 mi N
- Oceanside, OR423 people · 5 mi W
- Nehalem, OR271 people · 18 mi N
- Cape Meares, OR189 people · 7 mi NW
- Idaville, OR188 people · 4 mi N
- Barnesdale, OR157 people · 13 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Tillamook's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Tillamook. This page uses Tillamook; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Tillamook (6 mi SE) USC00358498 | 5 mi E | 140 ft | 50.3°F | 38°F | 68°F | 84.4 | – | April 5 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Tillamook's climate
What is the coldest month in Tillamook?
December, with a normal high of 51°F and a normal low of 36°F. The warmest is August (69°F by day, 50°F at night).
Does it snow in Tillamook?
Rarely: NOAA's normal is 0.2 inch a year.
What is the rainiest month in Tillamook?
December, with 14.65 in of precipitation in a normal year; the driest is July with 0.92 in.
What plant hardiness zone is Tillamook in?
The USDA's 2023 map puts Tillamook in zone 9a in ZIP code 97141, the nearest ZIP area. By the same method at Tillamook's NOAA station, the coldest night of a typical year reaches 20°F (24 years, 1991-2020): zone 8b.
How late can frost come in Tillamook?
In half of years the last 32°F night comes after April 22; in one year in ten it comes after May 13. Waiting until May 13 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Oregon climateThe statewide normals and every place in the state
- Cloverdale, OR17 miles from this station, 52.5°F a year
- Otis (2 mi NE), OR29 miles from this station, 51.7°F a year
- Forest Grove, OR37 miles from this station, 52.1°F a year
- Seaside, OR37 miles from this station, 51.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made