The year at a glance
Averages from 30 years of climate history, 1991-2020
| Issaquah | Metric | Newcastle |
|---|---|---|
| 140 days | Sunny daysclear or partly cloudy skies | 147 days |
| 63 in | Precipitationper year | 52 in |
| 168 days | Wet daysrain or snow per year | 155 days |
| 11 in | Snowfallper year | 6 in |
| 4 days | Hot daysabove 90 °F | 4 days |
| 38 days | Freezing nightsat or below 32 °F | 31 days |
| 80% | Humidityaverage relative | 79% |
| 53 °F | Average temperatureyear round | 54 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Issaquah high | 48 | 50 | 54 | 59 | 66 | 70 | 77 | 77 | 71 | 60 | 52 | 47 |
| Newcastle high | 48 | 51 | 55 | 60 | 67 | 71 | 77 | 78 | 72 | 61 | 53 | 47 |
| Issaquah low | 37 | 36 | 39 | 42 | 48 | 53 | 56 | 56 | 52 | 46 | 39 | 36 |
| Newcastle low | 37 | 37 | 39 | 43 | 49 | 54 | 58 | 58 | 53 | 46 | 40 | 36 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Issaquah | 8.4 | 5.8 | 6.5 | 5.4 | 3.8 | 3.2 | 1.3 | 1.6 | 3.4 | 6.6 | 9.0 | 8.1 |
| Newcastle | 6.9 | 4.8 | 5.5 | 4.5 | 3.0 | 2.3 | 1.0 | 1.3 | 2.6 | 5.3 | 7.6 | 7.0 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Issaquah | 7 | 9 | 8 | 9 | 11 | 12 | 20 | 21 | 18 | 12 | 7 | 7 |
| Newcastle | 7 | 10 | 9 | 10 | 12 | 13 | 20 | 21 | 18 | 12 | 8 | 7 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Issaquah vs another city
- Issaquah vs Sammamish, WA
- Issaquah vs East Renton Highlands, WA
- Issaquah vs Bellevue, WA
- Issaquah vs Fairwood, WA
- Issaquah vs Renton, WA
- Issaquah vs New York, NY
- Issaquah vs Los Angeles, CA
- Issaquah vs Chicago, IL
- Issaquah vs Houston, TX
- Issaquah vs Phoenix, AZ
- Issaquah vs Philadelphia, PA
Newcastle vs another city
- Newcastle vs Mercer Island, WA
- Newcastle vs Renton, WA
- Newcastle vs Bryn Mawr-Skyway, WA
- Newcastle vs Bellevue, WA
- Newcastle vs East Renton Highlands, WA
- Newcastle vs New York, NY
- Newcastle vs Los Angeles, CA
- Newcastle vs Chicago, IL
- Newcastle vs Houston, TX
- Newcastle vs Phoenix, AZ
- Newcastle vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).