Sumas Weather Forecast 15 Days, Weather in Sumas Today
Current weather conditions and 15 day weather forecast for Sumas, Washington, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Sumas
| 17 May 2026 Sunday 13 ° C / 55.4°F  Partly cloudy |
Feels Like : 13.1 ° C / 55.7°F Humidity : % 54 Pressure : 1019 mb Wind Speed : 5 kmph / 3.1 miles from SW  Visibility : 32 km Precipitation (rainfall) : 0.01 mm Cloud (%) : 75 |
15 day weather forecast for Sumas, WA, USA
Weather Forecast for next 15 Days for Sumas including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Sumas, Washington state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 16 May 2026 Saturday |  Moderate rain |
6.3 ° C (43.3°F) |
14.5 ° C (58.1°F) |
9.3 ° C (48.7°F) |
% 82 | 88% | 3.5 | Sunrise:05:25 AM Sunset: 08:47 PM |
Moonrise:04:46 AM Moonset: 09:33 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday |  Sunny |
1.9 ° C (35.4°F) |
17.4 ° C (63.3°F) |
10.6 ° C (51°F) |
% 70 | 0% | 6.3 | Sunrise:05:24 AM Sunset: 08:48 PM |
Moonrise:05:25 AM Moonset: 10:57 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday | Partly Cloudy |
5.9 ° C (42.6°F) |
17.6 ° C (63.6°F) |
11.2 ° C (52.1°F) |
% 65 | 0% | 5.4 | Sunrise:05:23 AM Sunset: 08:49 PM |
Moonrise:06:18 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday |  Patchy rain nearby |
6.6 ° C (43.8°F) |
14.9 ° C (58.8°F) |
10.4 ° C (50.7°F) |
% 86 | 82% | 3.9 | Sunrise:05:22 AM Sunset: 08:51 PM |
Moonrise:07:30 AM Moonset: 12:04 AM Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday | Sunny |
4.5 ° C (40.1°F) |
19.7 ° C (67.5°F) |
12 ° C (53.5°F) |
% 75 | 0% | 6.7 | Sunrise:05:21 AM Sunset: 08:52 PM |
Moonrise:08:52 AM Moonset: 12:54 AM Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Sunny |
5.9 ° C (42.6°F) |
21.3 ° C (70.4°F) |
11.4 ° C (52.5°F) |
% 76 | 0% | 0 | Sunrise:05:19 AM Sunset: 08:53 PM |
Moonrise:10:18 AM Moonset: 01:28 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Patchy rain nearby |
7.3 ° C (45.2°F) |
17.2 ° C (63°F) |
12.3 ° C (54.1°F) |
% 80 | 0% | 3 | Sunrise:05:18 AM Sunset: 08:55 PM |
Moonrise:11:41 AM Moonset: 01:53 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday | Partly Cloudy |
7.1 ° C (44.7°F) |
19.1 ° C (66.4°F) |
12.8 ° C (55.1°F) |
% 70 | 0% | 4 | Sunrise:05:17 AM Sunset: 08:56 PM |
Moonrise:12:59 PM Moonset: 02:11 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Sunny |
6.4 ° C (43.6°F) |
24.3 ° C (75.8°F) |
15.2 ° C (59.4°F) |
% 60 | 0% | 5 | Sunrise:05:16 AM Sunset: 08:57 PM |
Moonrise:02:13 PM Moonset: 02:26 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 May 2026 Monday | Partly Cloudy |
10.8 ° C (51.4°F) |
24.1 ° C (75.3°F) |
17.7 ° C (63.9°F) |
% 56 | 0% | 5 | Sunrise:05:15 AM Sunset: 08:58 PM |
Moonrise:03:25 PM Moonset: 02:40 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 May 2026 Tuesday | Patchy rain nearby |
7.9 ° C (46.2°F) |
11.3 ° C (52.4°F) |
10.1 ° C (50.2°F) |
% 94 | 87% | 3 | Sunrise:05:14 AM Sunset: 08:59 PM |
Moonrise:04:36 PM Moonset: 02:54 AM Moon Phase ( Waxing Gibbous ) |
|
| 27 May 2026 Wednesday | Moderate rain |
6.2 ° C (43.2°F) |
9.9 ° C (49.8°F) |
8.3 ° C (47°F) |
% 85 | 88% | 2 | Sunrise:05:13 AM Sunset: 09:00 PM |
Moonrise:05:47 PM Moonset: 03:08 AM Moon Phase ( Waxing Gibbous ) |
|
| 28 May 2026 Thursday | Patchy rain nearby |
5.7 ° C (42.3°F) |
13.1 ° C (55.6°F) |
8.4 ° C (47.1°F) |
% 92 | 88% | 2 | Sunrise:05:12 AM Sunset: 09:02 PM |
Moonrise:06:58 PM Moonset: 03:25 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 May 2026 Friday | Moderate rain |
6.3 ° C (43.4°F) |
10.9 ° C (51.6°F) |
8.6 ° C (47.5°F) |
% 92 | 85% | 2 | Sunrise:05:12 AM Sunset: 09:03 PM |
Moonrise:08:08 PM Moonset: 03:45 AM Moon Phase ( Waxing Gibbous ) |
|
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