Temperature
Pleasant by day, brisk at night.
74°Ftypical September high
Typical range
Mild days and plenty of sun.

Pleasant by day, brisk at night.
Several rainy days. About 10 wet days, the lowest monthly average.
Plenty of sun this month.
In September, afternoons feel about 70° and nights feel near 58°.
Partly cloudy skies this month.
Calm winds are typical in September.
September late afternoons are around 72°F, easing to about 67°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 35 | 23 | 3.5 | 15 | 4.5 | 77 |
| Feb | 38 | 24 | 2.9 | 12 | 6.2 | 74 |
| Mar | 46 | 31 | 3.4 | 13 | 7.6 | 70 |
| Apr | 58 | 42 | 4.4 | 14 | 9.0 | 68 |
| May | 69 | 53 | 4.5 | 14 | 10.6 | 72 |
| Jun | 77 | 62 | 5.3 | 14 | 12.0 | 74 |
| Jul | 81 | 66 | 4.8 | 14 | 12.3 | 75 |
| Aug | 79 | 65 | 4.5 | 13 | 11.1 | 78 |
| Sep | 74 | 58 | 3.8 | 10 | 9.6 | 78 |
| Oct | 62 | 48 | 3.8 | 13 | 7.4 | 75 |
| Nov | 50 | 38 | 3.5 | 13 | 5.6 | 73 |
| Dec | 40 | 29 | 3.8 | 15 | 4.0 | 77 |
Similar climates
Want a side-by-side climate view? Compare Ashtabula with Aberdeen.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jul 31, 2026
Data & methodology