The year at a glance
Averages from 30 years of climate history, 1991-2020
| Portland | Metric | Rochester |
|---|---|---|
| 160 days | Sunny daysclear or partly cloudy skies | 158 days |
| 37 in | Precipitationper year | 42 in |
| 157 days | Wet daysrain or snow per year | 167 days |
| 6 in | Snowfallper year | 98 in |
| 13 days | Hot daysabove 90 °F | 8 days |
| 22 days | Freezing nightsat or below 32 °F | 128 days |
| 76% | Humidityaverage relative | 72% |
| 55 °F | Average temperatureyear round | 49 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Portland high | 47 | 51 | 56 | 61 | 68 | 73 | 81 | 81 | 75 | 63 | 53 | 46 |
| Rochester high | 34 | 35 | 44 | 56 | 69 | 78 | 82 | 80 | 73 | 61 | 49 | 39 |
| Portland low | 37 | 38 | 40 | 44 | 49 | 53 | 58 | 58 | 55 | 47 | 41 | 37 |
| Rochester low | 19 | 19 | 26 | 37 | 48 | 57 | 62 | 61 | 53 | 43 | 34 | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Portland | 5.1 | 4.0 | 4.4 | 3.5 | 2.1 | 1.3 | 0.4 | 0.4 | 1.3 | 3.2 | 5.3 | 5.9 |
| Rochester | 3.4 | 2.6 | 3.1 | 3.9 | 3.2 | 3.5 | 3.5 | 3.2 | 3.4 | 4.3 | 3.7 | 3.7 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Portland | 7 | 8 | 8 | 9 | 13 | 15 | 24 | 25 | 21 | 15 | 8 | 7 |
| Rochester | 4 | 8 | 13 | 14 | 15 | 17 | 21 | 21 | 18 | 15 | 10 | 5 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Portland vs another city
- Portland vs West Haven-Sylvan, OR
- Portland vs Raleigh Hills, OR
- Portland vs Milwaukie, OR
- Portland vs West Slope, OR
- Portland vs Cedar Mill, OR
- Portland vs Vancouver, WA
- Portland vs New York, NY
- Portland vs Los Angeles, CA
- Portland vs Chicago, IL
- Portland vs Houston, TX
- Portland vs Phoenix, AZ
- Portland vs Philadelphia, PA
Rochester vs another city
- Rochester vs Irondequoit, NY
- Rochester vs Brighton, NY
- Rochester vs North Gates, NY
- Rochester vs Greece, NY
- Rochester vs Rochester Institute of Technology, NY
- Rochester vs East Rochester, NY
- Rochester vs New York, NY
- Rochester vs Los Angeles, CA
- Rochester vs Chicago, IL
- Rochester vs Houston, TX
- Rochester vs Phoenix, AZ
- Rochester 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).