Mount Vernon 7-day weather forecast

Written by:
September 8, 2025
ESOlex // Shutterstock

Mount Vernon 7-day weather forecast

Stacker created the forecast for Mount Vernon, Washington using data from OpenWeather. This week's high is 79 °F on Tuesday, while the low is 50 °F on Saturday. There are expected to be 3 sunny days and rain on 1 day this week.

NWS Seattle WA has issued a fire weather watch until Wednesday at 11:00 PM.

Monday, September 15

- High of 69 °F, low of 54 °F (59% humidity)
- Fair with a 0% chance of rain
- Moderate risk of harm from sun exposure (4 UV index)
- Gentle breeze (9 mph wind)
- Sunrise at 6:46 AM, sunset at 7:22 PM
1 / 6
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Tuesday, September 16

- High of 79 °F, low of 54 °F (47% humidity)
- Partly cloudy with a 0% chance of rain
- High risk of harm from sun exposure (5 UV index)
- Light breeze (6 mph wind)
- Sunrise at 6:48 AM, sunset at 7:20 PM
2 / 6
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Wednesday, September 17

- High of 72 °F, low of 54 °F (47% humidity)
- Sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (5 UV index)
- Light breeze (7 mph wind)
- Sunrise at 6:49 AM, sunset at 7:18 PM
3 / 6
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Thursday, September 18

- High of 68 °F, low of 53 °F (63% humidity)
- Mostly sunny with a 0% chance of rain
- Moderate risk of harm from sun exposure (5 UV index)
- Light breeze (7 mph wind)
- Sunrise at 6:50 AM, sunset at 7:15 PM
4 / 6
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Friday, September 19

- High of 69 °F, low of 54 °F (58% humidity)
- Overcast with a 0% chance of rain
- Moderate risk of harm from sun exposure (5 UV index)
- Light breeze (4 mph wind)
- Sunrise at 6:52 AM, sunset at 7:13 PM
5 / 6
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Saturday, September 20

- High of 68 °F, low of 50 °F (49% humidity)
- Overcast with a 0% chance of rain
- Moderate risk of harm from sun exposure (5 UV index)
- Light breeze (6 mph wind)
- Sunrise at 6:53 AM, sunset at 7:11 PM
6 / 6
John Cartwright // Shutterstock

Sunday, September 21

- High of 62 °F, low of 57 °F (86% humidity)
- Overcast with a 100% chance of rain (8 mm of rain)
- Moderate risk of harm from sun exposure (5 UV index)
- Gentle breeze (8 mph wind)
- Sunrise at 6:55 AM, sunset at 7:09 PM
- New moon

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