The Dalles Municipal Airport, Washington climate: Climate normals at a NOAA weather station
The Dalles Municipal Airport's normal year runs from 31°F December nights to 88°F July afternoons, with 13.7 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.4°C, December lows of −1°C, July highs of 31°C, 347 mm of precipitation a year.
- NOAA stationThe Dalles Municipal Airport
- Station IDUSW00024219
- Location45.62°N 121.17°W
- Elevation235 ft (72 m)
On October 23, the normal high in The Dalles Municipal Airport is 61°F and the normal low 40°F, and the chance of measurable rain or snow is 30%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for The Dalles Municipal Airport.
- Jan 42° 31°
- Feb 48° 32°
- Mar 57° 36°
- Apr 64° 42°
- May 74° 49°
- Jun 79° 55°
- Jul 88° 61°
- Aug 88° 60°
- Sep 80° 52°
- Oct 66° 43°
- Nov 50° 35°
- Dec 41° 31°
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 The Dalles Municipal Airport each month?
July is the warmest month, with normal highs of 88°F; December the coldest, with normal lows of 31°F. The most precipitation falls in December (2.68 in), the least in July (0.16 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 42°F | 31°F | 36.5°F | 2.38 | 14 | <1 | 16 | 9 h |
| February | 48°F | 32°F | 40.2°F | 1.58 | 11 | <1 | 15 | 10 h 20 min |
| March | 57°F | 36°F | 46.4°F | 1.18 | 11 | <1 | 9 | 11 h 50 min |
| April | 64°F | 42°F | 53.0°F | 0.83 | 8 | <1 | 2 | 13 h 30 min |
| May | 74°F | 49°F | 61.3°F | 0.76 | 6 | 2 | <1 | 14 h 50 min |
| June | 79°F | 55°F | 67.1°F | 0.48 | 4 | 5 | <1 | 15 h 40 min |
| July | 88°F | 61°F | 74.7°F | 0.16 | 2 | 15 | <1 | 15 h 20 min |
| August | 88°F | 60°F | 74.1°F | 0.16 | 2 | 15 | <1 | 14 h 10 min |
| September | 80°F | 52°F | 66.3°F | 0.33 | 3 | 6 | <1 | 12 h 40 min |
| October | 66°F | 43°F | 54.0°F | 1.14 | 8 | <1 | 3 | 11 h |
| November | 50°F | 35°F | 42.7°F | 1.97 | 13 | <1 | 10 | 9 h 30 min |
| December | 41°F | 31°F | 36.2°F | 2.68 | 14 | <1 | 17 | 8 h 40 min |
| Year (annual) | 65°F | 44°F | 54.4°F | 13.65 | 96 | 43 | 72 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 6°C | −1°C | 2.5°C | 60 mm |
| February | 9°C | 0°C | 4.6°C | 40 mm |
| March | 14°C | 2°C | 8.0°C | 30 mm |
| April | 18°C | 5°C | 11.7°C | 21 mm |
| May | 23°C | 9°C | 16.3°C | 19 mm |
| June | 26°C | 13°C | 19.5°C | 12 mm |
| July | 31°C | 16°C | 23.7°C | 4 mm |
| August | 31°C | 16°C | 23.4°C | 4 mm |
| September | 27°C | 11°C | 19.1°C | 8 mm |
| October | 19°C | 6°C | 12.2°C | 29 mm |
| November | 10°C | 2°C | 5.9°C | 50 mm |
| December | 5°C | −1°C | 2.3°C | 68 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, The Dalles (2 miles away), gets 6 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024219; 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 The Dalles Municipal Airport?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (3).
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 USW00024219.
When is the last frost at The Dalles Municipal Airport?
In The Dalles Municipal Airport, the last spring frost (32°F) comes after April 11 in half of years and after April 28 in one year in ten; the first autumn frost comes before October 26 in half of years and before October 9 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 111 year in 10 after April 28; 9 in 10 after March 24
- First autumn frost, half of years before
- October 261 year in 10 before October 9; 9 in 10 before November 10
NOAA puts the median frost-free season at 197 days, and the season without a hard freeze (28°F) at 233 days.
A hard freeze (28°F) comes after March 16 in half of springs and before November 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts The Dalles Municipal Airport in zone 8a in ZIP code 98617, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 8a: the coldest night of a typical year reaches 11°F (30 complete years).
Frost dates for every NOAA station in Washington · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00024219; 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 at The Dalles Municipal Airport?
In a normal year in The Dalles Municipal Airport, 43 days a year reach 90°F (8 of them 100°F or more), 72 nights fall to 32°F or colder and 96 days bring measurable precipitation.
- Days at 90°F or more
- 43a normal year
- Days at 100°F or more
- 8a normal year
- Nights at 32°F or colder
- 72a normal year
- Days that stay below freezing
- 9high of 32°F or less
- Days with 0.01 inch of precipitation
- 96a normal year
The highest temperature in this station's record (since 1948) is 118°F, on June 28, 2021; the lowest is −25°F, on February 3, 1950.
The wettest calendar year on that record is 1996, with 25.63 in; the snowiest season is 1949–50, with 66.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USW00024219; records: ACIS (NOAA Regional Climate Centers), station USW00024219. Records use complete months only; a month missing more than three days is left out.
How sunny is it at The Dalles Municipal Airport?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds at The Dalles Municipal Airport, 4.2 kWh per square metre a day. July is the sunniest month (93%) and December the cloudiest (56%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 57% | 1.3 |
| February | 66% | 2.3 |
| March | 68% | 3.5 |
| April | 75% | 5.1 |
| May | 78% | 6.3 |
| June | 83% | 7.1 |
| July | 93% | 7.7 |
| August | 91% | 6.5 |
| September | 86% | 4.8 |
| October | 76% | 3.0 |
| November | 64% | 1.6 |
| December | 56% | 1.1 |
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 The Dalles Municipal Airport record?
A normal year at The Dalles Municipal Airport brings 4,677 heating degree days, 13% fewer than the median U.S. place (5,373), and 830 cooling degree days, 9% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,192 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 884 | 0 |
| February | 693 | 0 |
| March | 575 | 0 |
| April | 364 | 2 |
| May | 154 | 38 |
| June | 43 | 106 |
| July | 2 | 303 |
| August | 2 | 285 |
| September | 54 | 92 |
| October | 344 | 5 |
| November | 670 | 0 |
| December | 893 | 0 |
| Year (annual) | 4,677 | 830 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00024219. 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.
Have recent years at The Dalles Municipal Airport been warmer than normal?
2023 averaged 55.8°F, 1.4°F above the 1991-2020 normal of 54.4°F. 3 of the 3 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 57.0°F | +2.6°F | 8.84 |
| 2022 | 56.5°F | +2.1°F | 12.41 |
| 2023 | 55.8°F | +1.4°F | 10.77 |
Over 72 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 3.2°F per century (+0.18°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USW00024219; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does The Dalles Municipal Airport's climate compare?
The Dalles Municipal Airport is warmer than 95 of the 96 places with their own NOAA record in Washington, and wetter than 26. Across the 7,247 U.S. stations with normals, its annual mean of 54.4°F is warmer than 58%.
In the Köppen classification computed from these normals, The Dalles Municipal Airport is Csa: temperate, dry-summer, hot 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 The Dalles Municipal Airport share this climate record?
2 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.
- Chenoweth, OR1,543 people · 3 mi W
- Rowena, OR128 people · 6 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 The Dalles Municipal Airport's climate
What is the coldest month at The Dalles Municipal Airport?
December, with a normal high of 41°F and a normal low of 31°F. The warmest is July (88°F by day, 61°F at night).
Does it snow at The Dalles Municipal Airport?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, The Dalles (2 miles away), records 6 inches of snow in a normal year.
What is the rainiest month at The Dalles Municipal Airport?
December, with 2.68 in of precipitation in a normal year; the driest is July with 0.16 in.
What plant hardiness zone is The Dalles Municipal Airport in?
The USDA's 2023 map puts The Dalles Municipal Airport in zone 8a in ZIP code 98617, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches 11°F (30 years, 1991-2020): zone 8a.
How late can frost come at The Dalles Municipal Airport?
In half of years the last 32°F night comes after April 11; 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
- Washington climateThe statewide normals and every place in the state
- The Dalles, OR2 miles from this station, 53.5°F a year
- Dufur, OR12 miles from this station, 50.5°F a year
- Snowden, WA16 miles from this station, 46.5°F a year
- Hood River Experiment Station, OR17 miles from this station, 51.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made