Portland, TN
Climate overview — based on NOAA 1991-2020 normals from PORTLAND SEWAGE PLT, TN US.
Year-round temperatures (°F)
Climate summary
Portland has an annual average temperature of 58.3°F with about 54.3 inches of precipitation per year and 2 inches of snow. The warmest month is July (average high 88.8°F), and the coldest is January (average low 26.6°F). May is typically the wettest month (5.80 in) and September the driest (3.64 in). Snow typically falls from January through March.
Best time to visit Portland
Full guide →Climate change signal
All-time records →59 of 366 (16.1%) of Portland's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1950s | 32 | |
| 1960s | 65 | |
| 1970s | 37 | |
| 1980s | 52 | |
| 1990s | 42 | |
| 2000s | 38 | |
| 2010s | 77 | |
| 2020s | 23 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 45.3°F | 26.6°F | 36.0°F | 4.20 in | 0.2 in | 11 |
| February | 50.3°F | 29.5°F | 39.9°F | 4.69 in | 1.5 in | 10 |
| March | 59.1°F | 37.0°F | 48.1°F | 5.08 in | 0.3 in | 12 |
| April | 69.8°F | 46.5°F | 58.2°F | 5.24 in | — | 11 |
| May | 77.7°F | 56.6°F | 67.2°F | 5.80 in | — | 11 |
| June | 85.3°F | 64.8°F | 75.1°F | 4.36 in | — | 10 |
| July | 88.8°F | 68.5°F | 78.6°F | 4.57 in | — | 10 |
| August | 88.1°F | 66.9°F | 77.5°F | 4.15 in | — | 8 |
| September | 82.2°F | 59.6°F | 70.9°F | 3.64 in | — | 8 |
| October | 71.4°F | 47.9°F | 59.7°F | 3.69 in | — | 8 |
| November | 58.9°F | 37.4°F | 48.2°F | 3.78 in | — | 9 |
| December | 48.9°F | 30.2°F | 39.6°F | 5.11 in | — | 11 |
Climate twins of Portland
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).