Jamestown, New York Weather
Hourly forecast in Jamestown
16-day forecast for Jamestown
Check any date
Jamestown air quality & conditions
Air quality index
Today's outlook for Jamestown
Loading today's outlook…
Explore nearby
Weather articles
Weather news
Climate of Jamestown: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Jamestown, with average daytime highs around 26°C. February is the coolest, when nights typically fall to about -8°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 35°C, so the seasons feel very different from each other.
The area receives about 1040 mm of rain in a typical year. Most of it falls from June to July and October, and October is the wettest month at roughly 107 mm.
For outdoor plans and travel, May and August to September usually offer the most comfortable weather in Jamestown, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | -1° | -8° | 71 mm | 92% |
| Feb | 0° | -8° | 61 mm | 90% |
| Mar | 5° | -4° | 73 mm | 85% |
| Apr | 12° | 1° | 84 mm | 80% |
| May | 19° | 8° | 98 mm | 79% |
| Jun | 23° | 13° | 101 mm | 78% |
| Jul | 26° | 16° | 103 mm | 75% |
| Aug | 26° | 15° | 86 mm | 73% |
| Sep | 23° | 11° | 93 mm | 74% |
| Oct | 15° | 5° | 107 mm | 80% |
| Nov | 8° | 0° | 80 mm | 85% |
| Dec | 1° | -5° | 84 mm | 91% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Jamestown. Values describe typical conditions, not a forecast.
About Jamestown weather
Jamestown is set in New York's humid continental climate, from the Atlantic coast to the Adirondacks, about 93 km south of Buffalo. Summers bring warm, humid summers (June–August). The year winds down with cold winters (December–February) with significant snow, especially upstate. This page shows live, auto-refreshing weather for Jamestown: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/New_York.
Frequently asked questions
Jamestown is about 93 km south of Buffalo, in New York.
Jamestown sees cold winters (December–February) with significant snow, especially upstate.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Jamestown's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Jamestown, with average daytime highs of about 26°C and nights around 16°C.
The coldest nights come in February, when the average low is about -8°C and daytime highs reach around 0°C. Frost is possible on clear, calm nights.
Jamestown receives about 1040 mm of rain in a typical year. October is the wettest month at roughly 107 mm, and the main rainy period is June to July and October.
May and August to September usually offer the most comfortable weather in Jamestown, with mild daytime temperatures and little rain.
In November Jamestown typically sees daytime highs near 8°C and lows near 0°C, with about 80 mm of rain over the month and average humidity around 85%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Jamestown is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Jamestown's day-to-day weather follows the broader pattern of New York described above. See the hourly weather forecast or the air quality index for more detail.