Aloha, Oregon climate: NOAA's gridded normals for the city, beside the nearest station records
NOAA's gridded 1991-2020 normals put Aloha's center at January lows of 36°F and July highs of 81°F, a yearly mean of 53.5°F and 40.2 inches of precipitation. No NOAA station keeps a record under the city's name. The nearest station record, Nature Park-Beaverton (2 miles E, 185 ft), has January lows of 40°F and July highs of 81°F.
53,362 people (Census Bureau 2024). Distances and directions are from the city's center.
- Jan 47° 36°
- Feb 51° 36°
- Mar 56° 38°
- Apr 61° 41°
- May 69° 46°
- Jun 73° 51°
- Jul 81° 55°
- Aug 82° 55°
- Sep 76° 51°
- Oct 64° 44°
- Nov 53° 39°
- Dec 46° 35°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
The months above are NOAA's gridded normals at Aloha's center.
What is each month like in Aloha?
NOAA's grid estimates the normals every 5 km or so from the stations around each point, terrain included. It smooths between stations, so night lows at the heart of a large city can run warmer than the grid shows: at five big-city airports we compared, the grid's highs were within about 1°F of the station and its lows 1-6°F cooler. The nearest record's high and low are beside each month.
| Month | High | Low | Mean | Precip. | Nature Park-Beaverton high | Nature Park-Beaverton low |
|---|---|---|---|---|---|---|
| January | 47°F | 36°F | 41.5°F | 5.85 | 50°F | 40°F |
| February | 51°F | 36°F | 43.5°F | 4.31 | 54°F | 40°F |
| March | 56°F | 38°F | 47.0°F | 4.28 | 58°F | 42°F |
| April | 61°F | 41°F | 51.1°F | 3.12 | 63°F | 45°F |
| May | 69°F | 46°F | 57.5°F | 2.24 | 70°F | 50°F |
| June | 73°F | 51°F | 62.1°F | 1.49 | 73°F | 53°F |
| July | 81°F | 55°F | 68.1°F | 0.40 | 81°F | 57°F |
| August | 82°F | 55°F | 68.2°F | 0.54 | 82°F | 57°F |
| September | 76°F | 51°F | 63.3°F | 1.46 | 76°F | 53°F |
| October | 64°F | 44°F | 53.8°F | 3.55 | 65°F | 47°F |
| November | 53°F | 39°F | 45.8°F | 6.05 | 55°F | 43°F |
| December | 46°F | 35°F | 40.5°F | 6.88 | 49°F | 40°F |
In metric: a yearly mean of 11.9°C, January lows of 2°C, July highs of 27°C and 1,020 mm of precipitation a year.
Source: NOAA NCEI U.S. Monthly Gridded Climate Normals 1991-2020 (nClimGrid, accession 0245564); NOAA NCEI 1991-2020 station normals. The grid cell holding the city's Census center point.
What do the station records around Aloha say?
Each row is a NOAA station's own 1991-2020 normals, with the snow and frost dates the grid does not give. A record downhill or nearer the coast than the city can run warmer, one uphill cooler: compare the elevations.
| Record | Where | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Nature Park-Beaverton | 2 mi E | 185 ft | 55.8°F | 40°F | 81°F | 39.2 | – | February 11 |
| Beaverton2 mi SSW | 4 mi SE | 270 ft | 53.7°F | 34°F | 82°F | – | – | April 1 |
| HillsboroPortland-Hillsboro Airport | 5 mi NW | 204 ft | 52.5°F | 34°F | 82°F | 35.9 | – | April 16 |
Source: NOAA NCEI 1991-2020 U.S. Climate Normals; place center and population: Census Bureau 2024. Last frost: the median last spring date of 32°F.
How much snow, how late a frost, what zone and how much sun in Aloha?
NOAA's grid gives no snow, frost dates or records, so these come from the nearest station record, Nature Park-Beaverton (2 miles E, 185 ft). NOAA publishes no snowfall normal for it; the nearest record that has one, Portland Kgw-Tv (9 miles away), gets 4 inches a year. The last spring frost (32°F) comes after February 11 in half of years and the first autumn frost before December 5.
The USDA's 2023 Plant Hardiness Zone Map puts Aloha in zones 8b to 9a across its 2 ZIP code areas.
Over a year 70% of the sunlight that would reach the ground under clear skies gets through the clouds in the area (3.7 kWh per square metre a day, NASA POWER 2001-2020); July is the sunniest month (83%) and December the cloudiest (52%).
Nature Park-Beaverton's page has its months, frost probabilities, records by month and recent years. NOAA's grid has monthly figures only, so there are no day-by-day month pages for Aloha; the nearest record's month pages have them.
Source: NOAA NCEI 1991-2020 normals, station USC00355945; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; sunshine: NASA POWER.
How does the climate vary across Aloha, ZIP code by ZIP code?
2 ZIP code areas lie wholly or partly in Aloha. On NOAA's grid 97003 is the warmest (53.5°F a year) and 97078 the coolest (53.4°F), so the city is nearly uniform. Each row also names the nearest station record and its frost dates.
| ZIP code | Zone | Year | Jan low | Jul high | Precip. | Nearest record | Last frost | First frost |
|---|---|---|---|---|---|---|---|---|
| 97003 | 9a | 53.5°F | 36°F | 81°F | 39.9 | Nature Park-Beaverton (1 mi) | February 11 | December 5 |
| 97078 | 8b | 53.4°F | 36°F | 81°F | 39.4 | Nature Park-Beaverton (3 mi) | February 11 | December 5 |
Source: Census Bureau 2020 ZCTA-to-place relationship file and ZCTA centers; NOAA NCEI gridded and station normals, 1991-2020. A ZIP area counts when at least a tenth of its land (and 0.5 km²) is in the city; its figures are the grid cell at its center; frost dates are the nearest record's medians of 32°F.