Kirkland
September
Weather in Kirkland for September 2025
Your guide to Kirkland weather in September - trends and predictions
In general, the average temperature in Kirkland at the beginning of September is 24.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.4 °C by the end of September.
Kirkland experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 121.9 mm.
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Temperatures
Rain 🌧️
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20
Dry days
10
Rainy days
0
Snow days
22°/12°
Temperatures
14 km/h
Avg max wind
75 %
Avg humidity
Kirkland in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  24° | 2 22° | 3 24° | 4  27° | 5 27° | 6 27° | 7  23° |
| 8  19° | 9 20° | 10 20° | 11  22° | 12 24° | 13  22° | 14 21° |
| 15 24° | 16 24° | 17  25° | 18 23° | 19 23° | 20 22° | 21 21° |
| 22 22° | 23 20° | 24 21° | 25  17° | 26 19° | 27 21° | 28 21° |
| 29 21° | 30 23° |
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Temperatures trend during September in Kirkland
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Mist | 24° /10° | 3.6 mm | 5 | |
| 2 Sept. | Mist | 22° /10° | 0 mm | 5 | |
| 3 Sept. | Fog | 24° /11° | 0 mm | 6 | |
| 4 Sept. | Cloudy | 27° /14° | 0 mm | 7 | |
| 5 Sept. | Mist | 27° /16° | 0 mm | 7 | |
| 6 Sept. | Cloudy | 27° /17° | 0.1 mm | 6 | |
| 7 Sept. | Patchy light rain with thunder | 23° /13° | 9.4 mm | 5 | |
| 8 Sept. | Light rain shower | 19° /12° | 9.8 mm | 5 | |
| 9 Sept. | Cloudy | 20° /8° | 0 mm | 5 | |
| 10 Sept. | Light rain shower | 20° /11° | 3.5 mm | 5 | |
| 11 Sept. | Overcast | 22° /11° | 1.6 mm | 6 | |
| 12 Sept. | Mist | 24° /13° | 2.3 mm | 6 | |
| 13 Sept. | Moderate rain | 22° /13° | 6.6 mm | 5 | |
| 14 Sept. | Overcast | 21° /12° | 0 mm | 6 | |
| 15 Sept. | Mist | 24° /11° | 0 mm | 6 | |
| 16 Sept. | Overcast | 24° /14° | 0 mm | 6 | |
| 17 Sept. | Partly cloudy | 25° /12° | 0 mm | 6 | |
| 18 Sept. | Light rain shower | 23° /13° | 0.9 mm | 6 | |
| 19 Sept. | Moderate rain | 23° /14° | 5.6 mm | 5 | |
| 20 Sept. | Cloudy | 22° /11° | 0 mm | 5 | |
| 21 Sept. | Partly cloudy | 21° /9° | 0 mm | 6 | |
| 22 Sept. | Mist | 22° /9° | 0 mm | 5 | |
| 23 Sept. | Overcast | 20° /11° | 0 mm | 5 | |
| 24 Sept. | Partly cloudy | 21° /12° | 0 mm | 6 | |
| 25 Sept. | Sunny | 17° /10° | 16.5 mm | 5 | |
| 26 Sept. | Sunny | 19° /9° | 62.1 mm | 5 | |
| 27 Sept. | Cloudy | 21° /8° | 0 mm | 5 | |
| 28 Sept. | Cloudy | 21° /11° | 0 mm | 5 | |
| 29 Sept. | Mist | 21° /9° | 0 mm | 5 | |
| 30 Sept. | Mist | 23° /11° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Kirkland in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Kirkland forecast closer to your planned date for the most up-to-date weather information.
Kirkland in September - FAQ
What are the expected maximum and minimum temperatures in Kirkland during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Kirkland during September?
Significant rainfall exceeding 121.9 mm is expected in Kirkland during September, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Kirkland during September?
The average wind speed in Kirkland during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Kirkland
Explore the daily rainfall trends and prepare for Kirklands September weather 💧
UV exposure in Kirkland during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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