Bothell, United States experiences average highs of 15°C (59°F) and lows of 8°C (46°F) throughout the year. Rainfall is frequent, averaging about 14 rainy days per month. Average highs have stayed broadly stable across the available records.
Bothell, United States Weather & Climate 2026
Monthly climate averages for Bothell, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
5.4/10
Best: June, July, August, September
UV Index
4
Low
Temperature 15°C / 8°C
Feels Like 14°C / 6°C
Rainy Days 14
Rainfall 116 mm
Sunshine 8 h
Humidity 79%
Wind Speed 16 km/h
Dew Point 8°C
Snow Days 3 days
Frost Days 4 days
Hottest Month
25°C
August
Avg Low15°C
Rain5days
Coldest Month
2°C
February
Avg High8°C
Rain17days
Driest Month
5days
July
Avg High25°C
Avg Low14°C
Windiest Month
18 km/h
December (Gusts 35)
Worst Time to Visit
Consider avoiding January, February, November, December due to heavy rainfall.
Sun Position
Sunrise 05:11
Daylight 16h
Sunset 21:10
Live conditions—
Bothell on the map · live conditions
Bothell, United States
- Continent
- Americas
- Country
- United States
- City
- Bothell
- Population
- 42.9K
- Elevation
- 22 m
- Coordinates
- 47.76°, -122.21°
Seasonal Breakdown
Spring
Mar–May
Avg High 14°C
Avg Low 6°C
Rain 15 days/mo
Summer
Jun–Aug
Avg High 24°C
Avg Low 14°C
Rain 7 days/mo
3/3 best months
Autumn
Sep–Nov
Avg High 16°C
Avg Low 9°C
Rain 15 days/mo
1/3 best months
Winter
Dec–Feb
Avg High 8°C
Avg Low 3°C
Rain 18 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 8°C / 3°C . Feb: 8°C / 2°C . Mar: 11°C / 4°C . Apr: 14°C / 6°C . May: 18°C / 9°C . Jun: 21°C / 12°C . Jul: 25°C / 14°C . Aug: 25°C / 15°C . Sep: 21°C / 13°C . Oct: 15°C / 9°C . Nov: 10°C / 6°C . Dec: 7°C / 3°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 184 mm. Feb: 147 mm. Mar: 129 mm. Apr: 107 mm. May: 79 mm. Jun: 70 mm. Jul: 21 mm. Aug: 31 mm. Sep: 73 mm. Oct: 151 mm. Nov: 189 mm. Dec: 205 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 84%. Feb: 83%. Mar: 81%. Apr: 77%. May: 76%. Jun: 74%. Jul: 70%. Aug: 71%. Sep: 77%. Oct: 83%. Nov: 85%. Dec: 85%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 17 km/h . Mar: 17 km/h . Apr: 17 km/h . May: 14 km/h . Jun: 14 km/h . Jul: 12 km/h . Aug: 13 km/h . Sep: 14 km/h . Oct: 16 km/h . Nov: 18 km/h . Dec: 18 km/h .
Sunshine
Sunshine
Sunshine: Jan: 4h. Feb: 5h. Mar: 8h. Apr: 9h. May: 11h. Jun: 12h. Jul: 13h. Aug: 12h. Sep: 10h. Oct: 7h. Nov: 5h. Dec: 4h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 1. Feb: UV 2. Mar: UV 3. Apr: UV 5. May: UV 6. Jun: UV 6. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 1.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 3 days. Feb: 6 days. Mar: 2 days. Apr: 1 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 1 days. Dec: 3 days.
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 25°C | Aug · 25°C |
| Coldest month | Feb 2025 · 1°C | Feb · 2°C |
| Wettest month | Dec 2025 · 305 mm | Dec · 205 mm |
| Windiest month | Dec 2025 · 21 km/h | Dec · 18 km/h |
Month-by-Month Weather Table
January
Wet 
February
Poor March
Poor April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Wet December
Wet | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 8°C / 3°C | 5°C / -1°C | 18days (184 mm) Wet | 4.3h Fair | 84% Humid | 1.2 Low | Wet | View Details |
| February | 8°C / 2°C | 5°C / -1°C | 17days (147 mm) Wet | 5.4h Fair | 83% Humid | 2 Low | Poor | View Details |
| March | 11°C / 4°C | 8°C / 0°C | 17days (129 mm) Wet | 7.6h Good | 81% Humid | 3.4 Moderate | Poor | View Details |
| April | 14°C / 6°C | 12°C / 3°C | 16days (107 mm) Wet | 9.4h Good | 77% Humid | 4.7 Moderate | Fair | View Details |
| May | 18°C / 9°C | 17°C / 7°C | 12days (79 mm) Wet | 11h Excellent | 76% Humid | 5.5 High | Good | View Details |
| June best | 21°C / 12°C | 21°C / 11°C | 10days (70 mm) Wet | 11.7h Excellent | 74% Muggy | 6.3 High | Excellent | View Details |
| July best | 25°C / 14°C | 25°C / 15°C | 5days (21 mm) Good | 12.7h Excellent | 70% Muggy | 6.9 High | Excellent | View Details |
| August best | 25°C / 15°C | 26°C / 15°C | 5days (31 mm) Good | 11.5h Excellent | 71% Muggy | 5.8 High | Excellent | View Details |
| September best | 21°C / 13°C | 21°C / 12°C | 9days (73 mm) Wet | 9.6h Good | 77% Humid | 4.6 Moderate | Excellent | View Details |
| October | 15°C / 9°C | 14°C / 6°C | 16days (151 mm) Wet | 7h Good | 83% Humid | 2.9 Moderate | Fair | View Details |
| November | 10°C / 6°C | 8°C / 3°C | 19days (189 mm) Wet | 4.6h Fair | 85% Humid | 1.6 Low | Wet | View Details |
| December | 7°C / 3°C | 4°C / 0°C | 19days (205 mm) Wet | 3.5h Poor | 85% Humid | 1 Low | Wet | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Bothell are June, July, August, September, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Bothell, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Bothell is August, with average daytime highs of 25°C (78°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Bothell is February, with average overnight lows of 2°C (36°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Bothell is December, averaging 205mm of precipitation across 19 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Bothell runs through November, December, January, February, with the heaviest rainfall in November. Based on 10-year averages for Bothell.
Bothell receives approximately 98 sunshine hours per year. The sunniest month is July with around 13 hours. Based on climate data for Bothell.
The least favorable months to visit Bothell are January, February, November, December, primarily due to heavy rainfall. For the best conditions, consider June, July, August, September instead.
The annual average UV index in Bothell is 4, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Bothell is 79%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Bothell receives snow. Months with snowfall average 3 snow days and 4 cm (2 in) of accumulation, with about 4 frost days during winter.
Average wind speeds in Bothell are 16 km/h (10 mph). The windiest month is December with peak winds reaching 18 km/h (11 mph) (gusts up to 35 km/h / 22 mph).
Bothell averages 4 clear-sky days per month with overall cloud cover around 64%. The clearest skies occur in July.
The annual average dew point in Bothell is 8°C (46°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Bothell has a Warm-Summer Mediterranean climate, classified as Csb under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in Bothell ranges from 6°C (43°F) to 14°C (57°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Bothell. It earns a climate score of 8.2/10 with Excellent.
For June in Bothell, pack Warm evening layer, Umbrella, Waterproof jacket, Sunscreen (SPF 30+), Sunglasses. With average highs of 21°C (69°F) and 10 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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