Hillsboro Climate by Month
Hillsboro, Oregon, United States
Warm summers and cool winters, with most rain from November to March.
Warm summers and cool winters, with most rain from November to March: that's Hillsboro's climate in short. Afternoon highs range from 47°F (8°C) in December to 83°F (28°C) in August, and December nights average 35°F (2°C). It gets 43 in (1080 mm) of rain a year, 71% of it from November to March.
- Warmest month
- 83°F(28°C)
- Average high, August
- Coldest nights
- 35°F(2°C)
- Average low, December
- Rain per year
- 43 in(1080 mm)
- Wettest: December
- Humidity
- 74%
- Sunniest: July
Best and worst months in Hillsboro
Best for weatherThe most comfortable weather comes in June and September, with highs around 76°F (24°C) and about 1.4 in (35 mm) of rain a month.
Least pleasantDecember is the least pleasant month: it's the coldest, with highs of only 47°F (8°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in June.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Hillsboro weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 47°F(9°C) | 35°F(2°C) | 6.5 in(164 mm) | 91% | 1.1 |
| FebFebruary | 52°F(11°C) | 36°F(2°C) | 4.8 in(122 mm) | 83% | 2.1 |
| MarMarch | 56°F(14°C) | 38°F(4°C) | 4.6 in(118 mm) | 72% | 2.9 |
| AprApril | 62°F(17°C) | 41°F(5°C) | 3.1 in(79 mm) | 70% | 4.1 |
| MayMay | 69°F(21°C) | 46°F(8°C) | 2.2 in(55 mm) | 68% | 5.1 |
| JunJuneBest | 74°F(23°C) | 51°F(10°C) | 1.4 in(36 mm) | 63% | 5.6 |
| JulJuly | 82°F(28°C) | 55°F(13°C) | 0.4 in(11 mm) | 59% | 6.2 |
| AugAugust | 83°F(28°C) | 53°F(12°C) | 0.6 in(15 mm) | 60% | 5.5 |
| SepSeptemberBest | 78°F(25°C) | 49°F(10°C) | 1.3 in(34 mm) | 65% | 4.1 |
| OctOctober | 65°F(19°C) | 42°F(6°C) | 3.5 in(88 mm) | 78% | 2.2 |
| NovNovember | 53°F(12°C) | 38°F(3°C) | 6.5 in(166 mm) | 87% | 1.3 |
| DecDecember | 47°F(8°C) | 35°F(2°C) | 7.6 in(192 mm) | 93% | 0.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate
All 20 places like Hillsboro →- 🇺🇸CorvallisOregon, United States · Pop. 56k99%matchSame winter lowsSame summer highsHillsboro vs Corvallis →
- 🇺🇸EugeneOregon, United States · Pop. 177k97%matchSame winter lowsSimilar rainfallHillsboro vs Eugene →
- 🇺🇸OlympiaWashington, United States · Pop. 56k95%matchSame winter lowsSimilar rainfallHillsboro vs Olympia →
- 🇺🇸TacomaWashington, United States · Pop. 223k94%matchSame winter lowsSimilar rainfallHillsboro vs Tacoma →
- 🇨🇱Temuco↻Seasons flipped. Araucania, Chile · Pop. 238k88%matchSame humidityWetter summersHillsboro vs Temuco →