West Seneca climate — normals and trends
West Seneca (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.6 °C and it receives 1,086 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (21.1 °C on average) and the coldest is January (-4.3 °C). Rainfall peaks in July.
West Seneca averages 122 frost days, 5 hot days (≥ 30 °C) and 162 rainy days per year.
West Seneca has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 134 to 110 per year over the period.
The hottest day of the period reached 34.7 °C (on 3 September 1953) and the coldest -26.3 °C (on 17 February 1979).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
West SenecaNew York
- coords
- 42.85°, -78.80°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.6°C
Average daily high
12.8°C
Average daily low
4.5°C
Annual rainfall
1,086mm
Sunshine / day
8.5h
Mean relative humidity
74%
Average peak wind
19.2km/h
Seasonal range
25.4°C
Frost days (< 0 °C)
122 d/yr
Hot days (≥ 30 °C)
5 d/yr
Rainy days (≥ 1 mm)
162 d/yr
Annual snowfall
145.1 cm
Average feels-like high
10.7 °C
Average feels-like low
1.4 °C
Average peak gust
42.0 km/h
Tropical nights (≥ 20 °C)
12 d/yr
Solar radiation
13.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.32 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
34.7 °C
3 September 1953
Coldest day
-26.3 °C
17 February 1979
Wettest day
80 mm
14 September 1979
Windiest day
53.5 km/h
6 April 1979
Strongest gust
117.0 km/h
14 January 1940
Hottest feels-like
39.3 °C
3 September 1953
Coldest feels-like
-32.1 °C
24 January 1963
Snowiest day
26.5 cm
3 March 1942
Sunniest day
14.9 h
5 July 1940
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -2.2 °C | -1.3 °C | 68 mm | -14 mm |
| Feb | -0.3 °C | -0.3 °C | 85 mm | +13 mm |
| Mar | 9.8 °C | +4.8 °C | 67 mm | -21 mm |
| Apr | 12.8 °C | +0.7 °C | 114 mm | +17 mm |
| May | 17.0 °C | -1.4 °C | 133 mm | +38 mm |
| Jun | 24.4 °C | +1.1 °C | 87 mm | -13 mm |
| Jul | 27.3 °C | +1.8 °C | 65 mm | -36 mm |
| Aug | 25.0 °C | +0.4 °C | 42 mm | -49 mm |
| Sep | 23.2 °C | +2.2 °C | 31 mm | -56 mm |
| Oct | 16.1 °C | +1.3 °C | 115 mm | +24 mm |
| Nov | 7.2 °C | -0.8 °C | 98 mm | +5 mm |
| Dec | 1.0 °C | -0.9 °C | 101 mm | +12 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of West Seneca?
West Seneca has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.6 °C and it receives 1,086 mm of precipitation per year.
What is the hottest day ever recorded in West Seneca?
The hottest day measured in West Seneca between 1940 and 2025 was 3 September 1953, reaching 34.7 °C.
What is the coldest day in West Seneca?
The coldest day measured in West Seneca between 1940 and 2025 was 17 February 1979, at -26.3 °C.
Does it snow in West Seneca?
Yes. West Seneca gets on average 145.1 cm of snow per year and has around 122 frost days.
Has the climate of West Seneca warmed?
Yes: West Seneca warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in West Seneca?
The wettest day measured in West Seneca between 1940 and 2025 was 14 September 1979, with 80 mm of rain in 24 hours.
What was the windiest day in West Seneca?
The windiest day measured in West Seneca between 1940 and 2025 was 6 April 1979, with winds reaching 53.5 km/h.
What is the warmest month in West Seneca?
The warmest month in West Seneca is July (21.1 °C on average); the coldest is January (-4.3 °C).
How much does it rain in West Seneca?
West Seneca receives on average 1,086 mm of precipitation per year, spread over about 162 rainy days.
Is it sunny in West Seneca?
West Seneca gets on average 8.5 hours of sunshine per day, roughly 3,103 hours per year over 1940-2025.
What is the biggest single-day snowfall in West Seneca?
The heaviest 24-hour snowfall measured in West Seneca between 1940 and 2025 was 3 March 1942, with 26.5 cm.
Are there tropical nights in West Seneca?
Yes: West Seneca has on average 12 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in West Seneca?
In West Seneca, between 1940 and 2025, the highest apparent temperature reached 39.3 °C on 3 September 1953, and the lowest was -32.1 °C on 24 January 1963.
Compare West Seneca with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around West Seneca