The year at a glance
Averages from 30 years of climate history, 1991-2020
| Cornelius | Metric | Rockcreek |
|---|---|---|
| 164 days | Sunny daysclear or partly cloudy skies | 164 days |
| 49 in | Precipitationper year | 49 in |
| 139 days | Wet daysrain or snow per year | 139 days |
| 7 in | Snowfallper year | 7 in |
| 21 days | Hot daysabove 90 °F | 16 days |
| 59 days | Freezing nightsat or below 32 °F | 39 days |
| 77% | Humidityaverage relative | 76% |
| 52 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cornelius high | 46 | 50 | 55 | 60 | 68 | 73 | 82 | 82 | 76 | 64 | 51 | 45 |
| Rockcreek high | 48 | 53 | 57 | 62 | 69 | 74 | 82 | 82 | 76 | 64 | 54 | 47 |
| Cornelius low | 33 | 33 | 36 | 39 | 45 | 50 | 54 | 53 | 49 | 42 | 37 | 33 |
| Rockcreek low | 37 | 36 | 39 | 42 | 47 | 51 | 54 | 54 | 50 | 44 | 39 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cornelius | 6.8 | 5.2 | 6.0 | 4.5 | 2.7 | 1.6 | 0.4 | 0.5 | 1.7 | 4.2 | 7.0 | 8.0 |
| Rockcreek | 6.8 | 5.2 | 6.0 | 4.5 | 2.7 | 1.6 | 0.4 | 0.5 | 1.7 | 4.2 | 7.0 | 8.0 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cornelius | 7 | 9 | 9 | 10 | 14 | 16 | 25 | 25 | 21 | 15 | 8 | 7 |
| Rockcreek | 7 | 9 | 9 | 10 | 14 | 16 | 25 | 25 | 21 | 15 | 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.
Cornelius vs another city
- Cornelius vs Forest Grove, OR
- Cornelius vs Hillsboro, OR
- Cornelius vs Aloha, OR
- Cornelius vs Oak Hills, OR
- Cornelius vs Bethany, OR
- Cornelius vs New York, NY
- Cornelius vs Los Angeles, CA
- Cornelius vs Chicago, IL
- Cornelius vs Houston, TX
- Cornelius vs Phoenix, AZ
- Cornelius vs Philadelphia, PA
Rockcreek vs another city
- Rockcreek vs Oak Hills, OR
- Rockcreek vs Bethany, OR
- Rockcreek vs Hillsboro, OR
- Rockcreek vs Marlene Village, OR
- Rockcreek vs Cedar Mill, OR
- Rockcreek vs Aloha, OR
- Rockcreek vs New York, NY
- Rockcreek vs Los Angeles, CA
- Rockcreek vs Chicago, IL
- Rockcreek vs Houston, TX
- Rockcreek vs Phoenix, AZ
- Rockcreek 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).