Lewiston and South Portland have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Lewiston | Metric | South Portland |
|---|---|---|
| 196 days | Sunny daysclear or partly cloudy skies | 201 days |
| 42 in | Precipitationper year | 42 in |
| 125 days | Wet daysrain or snow per year | 121 days |
| 68 in | Snowfallper year | 69 in |
| 9 days | Hot daysabove 90 °F | 5 days |
| 144 days | Freezing nightsat or below 32 °F | 138 days |
| 73% | Humidityaverage relative | 74% |
| 46 °F | Average temperatureyear round | 48 °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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lewiston high | 28 | 32 | 40 | 53 | 65 | 74 | 80 | 79 | 70 | 58 | 45 | 34 |
| South Portland high | 32 | 35 | 42 | 54 | 64 | 74 | 80 | 79 | 71 | 60 | 48 | 38 |
| Lewiston low | 11 | 13 | 22 | 34 | 45 | 55 | 61 | 60 | 51 | 40 | 31 | 20 |
| South Portland low | 16 | 17 | 26 | 35 | 46 | 55 | 61 | 60 | 52 | 41 | 32 | 22 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lewiston | 3.2 | 3.0 | 3.8 | 3.8 | 3.1 | 3.7 | 3.1 | 3.1 | 3.4 | 4.5 | 3.6 | 4.1 |
| South Portland | 3.3 | 3.1 | 4.1 | 3.8 | 2.9 | 3.4 | 2.9 | 2.9 | 3.2 | 4.3 | 3.5 | 4.3 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Lewiston | 18 | 16 | 16 | 15 | 15 | 15 | 18 | 19 | 18 | 17 | 16 | 16 |
| South Portland | 18 | 16 | 16 | 15 | 15 | 15 | 18 | 19 | 17 | 18 | 16 | 16 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Lewiston vs another city
- Lewiston vs Auburn, ME
- Lewiston vs Topsham, ME
- Lewiston vs Brunswick, ME
- Lewiston vs Bath, ME
- Lewiston vs Yarmouth, ME
- Lewiston vs Gardiner, ME
- Lewiston vs New York, NY
- Lewiston vs Los Angeles, CA
- Lewiston vs Chicago, IL
- Lewiston vs Houston, TX
- Lewiston vs Phoenix, AZ
- Lewiston vs Philadelphia, PA
South Portland vs another city
- South Portland vs Oak Hill, ME
- South Portland vs Portland, ME
- South Portland vs Westbrook, ME
- South Portland vs Old Orchard Beach, ME
- South Portland vs Gorham, ME
- South Portland vs Saco, ME
- South Portland vs New York, NY
- South Portland vs Los Angeles, CA
- South Portland vs Chicago, IL
- South Portland vs Houston, TX
- South Portland vs Phoenix, AZ
- South Portland 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).