Live Weather & Forecast
Weather in Sumas
Washington, United States · Real-time conditions & 3-day outlook
10°C
Feels like 11°C
51°F / Feels 51°F
Mist
Sumas, Washington
🌙 Nighttime
Updated: 2026-04-11 23:00
Humidity
100%
Wind
3.6 km/h N
Wind Gust
10.8 km/h
Pressure
1007 mb
Visibility
8 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
100%
Dew Point
8.7°C
Wind Degree
10°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (2)
CO
239.9 μg/m³
NO₂
21 μg/m³
O₃
38 μg/m³
SO₂
3.1 μg/m³
PM 2.5
21.9 μg/m³
PM 10
22.1 μg/m³
Today's Hourly Forecast
24-hour breakdown for Sumas, Washington
12 AM
11°
Clear
1 AM
11°
Clear
2 AM
10°
Clear
3 AM
10°
Clear
4 AM
9°
Clear
5 AM
9°
Clear
6 AM
8°
Clear
7 AM
9°
Sunny
8 AM
10°
Sunny
9 AM
11°
Sunny
10 AM
12°
Sunny
11 AM
12°
Sunny
12 PM
12°
Sunny
1 PM
13°
Patchy rain nearby
2 PM
13°
Patchy rain nearby
3 PM
12°
Patchy rain nearby
4 PM
11°
Light drizzle
5 PM
11°
Light drizzle
6 PM
11°
Light drizzle
7 PM
11°
Light drizzle
8 PM
10°
Patchy rain nearby
9 PM
10°
Fog
10 PM
10°
Fog
11 PM
10°
Mist
3-Day Forecast
Daily overview for Sumas, Washington
Today
Patchy rain nearby
14°
/
8°
🌧️ 84% chance of rain
💧 Avg. humidity: 84%
💨 Max wind: 7.6 km/h
🌧️ Total precip: 2.62 mm
☀️ UV Index: 0.3
🌅 Sunrise: 06:25 AM
🌇 Sunset: 07:56 PM
🌙 Waning Crescent
🌑 Moon: 42% lit
Sun, Apr 12
Partly Cloudy
14°
/
7°
🌧️ 0% chance of rain
💧 Avg. humidity: 89%
💨 Max wind: 7.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:23 AM
🌇 Sunset: 07:57 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
7°
/
6°
🌧️ 89% chance of rain
💧 Avg. humidity: 92%
💨 Max wind: 14.4 km/h
🌧️ Total precip: 8.61 mm
☀️ UV Index: 0.3
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:59 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Best Time to Visit Sumas
Plan your trip to Sumas, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
People also ask — answers optimized for search engines and voice queries.
What is the current weather in Sumas?
Current conditions in Sumas: Mist, temperature 10°C, humidity 100%.
What is the best time to visit Sumas?
The best time to visit Sumas is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Sumas?
Sumas is located at approximately 49° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Sumas?
The wettest period in Sumas is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Sumas?
For visits to Sumas during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Sumas in?
Sumas is located in United States, in the state of Washington.
What are the public holidays in Sumas in 2026?
View the 2026 public holidays for Sumas on our Holidays page.
What are the GPS coordinates used for the weather forecast in Sumas?
The weather forecast for Sumas uses coordinates 49, -122.2649.