Seattle weather in June
In June, Seattle has daytime highs averaging 21 °C, nights around 11 °C, with 9.9 wet days. Figures are 1991–2020 climate normals.
- 20.6°C Average high
- 11.1°C Average low
- 9.9days Wet days
- 59mm Rainfall
- 16h Daylight
Daily temperatures through June
How June develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 June | 19.8 °C | 10.6 °C | 38 % |
| 11–20 June | 19.7 °C | 10.7 °C | 35 % |
| 21–30 June | 22.2 °C | 12.1 °C | 27 % |
- Average highs rise from 19.8 °C early in June to 22.2 °C by the end of it.
- Rain is most likely over days 1–10 of June (38 % of days) and least likely over days 21–30 (27 %).
What to expect
| Measure | Typical June | Share of the month |
|---|---|---|
| Days above 25 °C | 3.8 of 30 | 13 % |
| Days above 30 °C | 0.7 of 30 | 2 % |
| Days below 0 °C | 0 of 30 | 0 % |
| Days with more than 1 mm rain | 9.9 of 30 | 33 % |
Conditions in June
| Measure | Average |
|---|---|
| Mean temperature | 15 °C |
| Record high (1991–2020) | 33 °C |
| Record low (1991–2020) | 3.9 °C |
| Relative humidity | 72 % |
| Wind speed | 13 km/h |
| Cloud cover | 62 % |
Where Seattle ranks in June
| Ranking | Position | Value |
|---|---|---|
| The coolest places in North America in June | 14thof 50 | 21 °C |
| Places with the best weather in North America in June | 31stof 50 | 87/100 |
June compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| April | 14.2 °C | 111 mm | 69 % |
| May | 17.9 °C | 76 mm | 65 % |
| June | 20.6 °C | 59 mm | 62 % |
| July | 24.6 °C | 25 mm | 45 % |
| August | 24.9 °C | 34 mm | 45 % |
See all twelve months for Seattle
- June is the 4th warmest month here.
- It is the 3rd driest month of the year.
- It ranks 4th for least cloud cover.
- Days last about 16 hours from sunrise to sunset.
- It rains on 9.9 of 30 days — 33 % of the month.
- Nights are about 9.5 °C cooler than the middle of the day.
- The hottest June day on record since 1991 reached 33 °C, 12 °C above the usual daytime high.
Nearby destinations in June
QuestionsJune in Seattle, answered
How warm is Seattle in June?
Daily highs average 21 °C and nights fall to about 11 °C, a spread of 9.5 °C between afternoon and dawn. That makes June the 4th warmest month of the year here.
Does it rain much in Seattle in June?
June averages 59 mm of rain, spread over about 10 of the 30 days — 33 % of the month. Cloud cover averages 62 % of the sky.
How long are the days in June?
Seattle averages 16 hours between sunrise and sunset in June. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.