Sullivan and Washington have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Sullivan | Metric | Washington |
|---|---|---|
| 204 days | Sunny daysclear or partly cloudy skies | 203 days |
| 41 in | Precipitationper year | 41 in |
| 120 days | Wet daysrain or snow per year | 119 days |
| 10 in | Snowfallper year | 10 in |
| 43 days | Hot daysabove 90 °F | 41 days |
| 120 days | Freezing nightsat or below 32 °F | 114 days |
| 69% | Humidityaverage relative | 70% |
| 55 °F | Average temperatureyear round | 55 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sullivan high | 42 | 48 | 58 | 69 | 77 | 85 | 89 | 88 | 81 | 70 | 57 | 46 |
| Washington high | 40 | 46 | 56 | 68 | 76 | 84 | 89 | 87 | 80 | 69 | 55 | 45 |
| Sullivan low | 21 | 24 | 32 | 42 | 52 | 61 | 65 | 63 | 54 | 42 | 32 | 25 |
| Washington low | 20 | 24 | 32 | 43 | 54 | 64 | 67 | 65 | 56 | 44 | 33 | 25 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sullivan | 2.7 | 2.5 | 3.7 | 4.6 | 4.9 | 3.9 | 3.4 | 3.0 | 3.3 | 3.3 | 3.5 | 2.5 |
| Washington | 2.6 | 2.4 | 3.7 | 4.6 | 4.9 | 4.0 | 3.4 | 3.2 | 3.2 | 3.3 | 3.5 | 2.5 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sullivan | 15 | 13 | 15 | 15 | 15 | 17 | 20 | 21 | 21 | 20 | 17 | 15 |
| Washington | 15 | 13 | 15 | 15 | 15 | 17 | 20 | 21 | 21 | 20 | 17 | 14 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Sullivan vs another city
- Sullivan vs Union, MO
- Sullivan vs Pacific, MO
- Sullivan vs De Soto, MO
- Sullivan vs Eureka, MO
- Sullivan vs Wildwood, MO
- Sullivan vs New York, NY
- Sullivan vs Los Angeles, CA
- Sullivan vs Chicago, IL
- Sullivan vs Houston, TX
- Sullivan vs Phoenix, AZ
- Sullivan vs Philadelphia, PA
Washington vs another city
- Washington vs Union, MO
- Washington vs Pacific, MO
- Washington vs Wildwood, MO
- Washington vs Wright City, MO
- Washington vs Warrenton, MO
- Washington vs Wentzville, MO
- Washington vs New York, NY
- Washington vs Los Angeles, CA
- Washington vs Chicago, IL
- Washington vs Houston, TX
- Washington vs Phoenix, AZ
- Washington 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).