Gresham weather by month
Warmest month
August
86°F (30°C) average high
Coolest month
January
35°F (2°C) average low
Wettest month
December
6.1 in (156 mm) of rain
Driest month
July
0.3 in (7 mm) of rain
Average temperature and rainfall in Gresham by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 46°F | 35°F | 16°F / 58°F | 4.7 in | 81% | 9 mph |
| February | 49°F | 37°F | 21°F / 61°F | 3.7 in | 82% | 9 mph |
| March | 54°F | 40°F | 24°F / 75°F | 4.1 in | 77% | 7 mph |
| April | 61°F | 43°F | 32°F / 81°F | 3.4 in | 72% | 6 mph |
| May | 69°F | 49°F | 39°F / 89°F | 2.4 in | 71% | 5 mph |
| June | 77°F | 53°F | 40°F / 98°F | 1.7 in | 64% | 5 mph |
| July | 85°F | 56°F | 48°F / 97°F | 0.3 in | 60% | 5 mph |
| August | 86°F | 58°F | 48°F / 104°F | 0.6 in | 60% | 5 mph |
| September | 77°F | 54°F | 46°F / 99°F | 2.6 in | 69% | 5 mph |
| October | 65°F | 47°F | 36°F / 84°F | 3.8 in | 76% | 6 mph |
| November | 54°F | 43°F | 23°F / 69°F | 4.8 in | 84% | 7 mph |
| December | 45°F | 37°F | 19°F / 63°F | 6.1 in | 84% | 9 mph |
Frost and snow-likely months in Gresham
Nights in Gresham average 36°F (2°C) or below in 1 month (January). No month combines freezing average lows with 0.4 in (10 mm) or more of precipitation, so snow is uncommon. The coldest month is January with an average low of 35°F (2°C) and a record low of 16°F (-9°C).
- January: average low 35°F (2°C), record low 16°F (-9°C), 4.7 in (119 mm) of precipitation
These records carry temperature and precipitation, not snowfall totals.
Best time to visit Gresham
The most comfortable time to visit Gresham is generally May to June and September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around December, totalling about 38.1 in (969 mm) a year.
Travellers who prefer heat should aim for August, when highs average 86°F (30°C). December is the month to avoid if rain would spoil your plans — it averages 6.1 in (156 mm), roughly 21× the rainfall of the driest month (July).
Gresham climate: your questions
Is it going to snow in Gresham this year?
Rarely: nights dip to 36°F (2°C) or below only in January, and the coldest month, January, averages a low of 35°F (2°C) (record low 16°F (-9°C)), so snow is uncommon. Our records carry temperature and precipitation, not snowfall totals. What is falling now: Gresham weather today.
Will Gresham see snow this winter?
Gresham's winter months average lows of 37°F (3°C) in December, 35°F (2°C) in January and 37°F (3°C) in February, with about 14.5 in (369 mm) of precipitation across the three; 0 of them sit at or below 32°F (0°C), so snow is unlikely. The records hold no snowfall totals. The next 15 days: Gresham 10-day forecast.
When is the best time to visit Gresham?
May to June and September are the most comfortable months in Gresham, with highs near 74°F (24°C). August is the warmest month, averaging 86°F (30°C) by day; December is the wettest, with 6.1 in (156 mm); and January is the coolest, with lows near 35°F (2°C). What it is doing today: Gresham weather today.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Gresham forecast for what is happening now.
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