Tri-Cities Climate: Weather by Month and Best Time to Visit
Best months for Tri-Cities: September, May, June, April.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 6°C | -2°C | 34 mm | 8 | – | – | 5.1 |
| February | 10°C | 0°C | 23 mm | 6 | – | – | 6.1 |
| March | 15°C | 3°C | 23 mm | 7 | – | – | 7.2 |
| April | 21°C | 7°C | 17 mm | 5 | – | – | 8.3 |
| May | 27°C | 11°C | 18 mm | 4 | – | – | 8.5 |
| June | 30°C | 14°C | 13 mm | 3 | – | – | 8.4 |
| July | 35°C | 18°C | 4 mm | 1 | – | – | 7.2 |
| August | 34°C | 17°C | 4 mm | 1 | – | – | 7.5 |
| September | 29°C | 12°C | 7 mm | 2 | – | – | 8.9 |
| October | 20°C | 7°C | 21 mm | 5 | – | – | 8.0 |
| November | 11°C | 2°C | 29 mm | 7 | – | – | 6.3 |
| December | 5°C | -1°C | 35 mm | 9 | – | – | 5.0 |