Sumas, WA weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Sumas now
Loading the National Weather Service forecast…
Sumas weather by the hour
Sumas weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Sumas.
This week in Sumas
Sunrise, sunset and moon in Sumas
What is the weather usually like in Sumas?
Köppen climate classification, calculated from the 1991–2020 normals
- Augustwarmest month · 77°F average high
- Januarycoldest month · 32°F average low
- 49.8 inprecipitation per year · 1,266 mm
- 10.8 insnowfall per year · 27 cm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Sumas: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station CLEARBROOK, WA US (USC00451484), adjusted for the elevation of Sumas.
Sumas weather month by month
Sunrise and sunset in Sumas through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:55 AM | 4:41 PM | 8 h 46 min |
| February | 7:14 AM | 5:31 PM | 10 h 16 min |
| March | 7:19 AM | 7:15 PM | 11 h 56 min |
| April | 6:15 AM | 8:02 PM | 13 h 47 min |
| May | 5:24 AM | 8:46 PM | 15 h 22 min |
| June | 5:02 AM | 9:17 PM | 16 h 14 min |
| July | 5:19 AM | 9:10 PM | 15 h 50 min |
| August | 6:00 AM | 8:26 PM | 14 h 26 min |
| September | 6:44 AM | 7:23 PM | 12 h 39 min |
| October | 7:28 AM | 6:20 PM | 10 h 52 min |
| November | 7:17 AM | 4:30 PM | 9 h 12 min |
| December | 7:54 AM | 4:13 PM | 8 h 19 min |
Times for the 15th of each month, local time (America/Los Angeles).
What is the weather like in Sumas?
Sumas has a warm-summer mediterranean climate. The warmest month is August, with an average high of 77°F (25°C), and the coldest is January, with average lows of 32°F (0°C).
It gets about 49.8 inches (1,266 mm) of precipitation a year. The wettest month is November and the driest is July. Snow is common: about 11 inches fall in an average year.
The best time to visit Sumas is June to September. At 43 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Sumas
Weather in towns near Sumas
Questions about the weather in Sumas
What is the hottest month in Sumas?
August, with an average high of 77°F (25°C).
What is the coldest month in Sumas?
January, with an average low of 32°F (0°C).
How much does it rain in Sumas?
About 49.8 inches (1,266 mm) a year; the wettest month is November.
Does it snow in Sumas?
Yes, about 11 inches of snow fall in an average year.
When is the best time to visit Sumas?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Sumas have?
Warm-summer mediterranean (Köppen Csb).
What is the weather like in Sumas in November?
Highs average 49°F and lows 36°F, with about 7.1 inches of precipitation.
What time is sunrise in Sumas?
Around 7:17 AM in mid-November, and sunset around 4:30 PM. Today’s exact times are shown above.
Where does this Sumas weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Sumas.
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