Westfield climate — normals and trends
Westfield (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 11.1 °C and it receives 1,022 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 (23.5 °C on average) and the coldest is January (-3.0 °C). Rainfall peaks in May.
Westfield averages 106 frost days, 27 hot days (≥ 30 °C) and 123 rainy days per year.
Westfield has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 118 to 94 per year over the period.
The hottest day of the period reached 39.0 °C (on 25 June 1988) and the coldest -30.6 °C (on 19 January 1994).
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
WestfieldIndiana
- coords
- 40.04°, -86.13°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.1°C
Average daily high
15.9°C
Average daily low
6.5°C
Annual rainfall
1,022mm
Sunshine / day
8.8h
Mean relative humidity
71%
Average peak wind
19.5km/h
Seasonal range
26.5°C
Frost days (< 0 °C)
106 d/yr
Hot days (≥ 30 °C)
27 d/yr
Rainy days (≥ 1 mm)
123 d/yr
Annual snowfall
55.9 cm
Average feels-like high
14.2 °C
Average feels-like low
3.8 °C
Average peak gust
38.7 km/h
Tropical nights (≥ 20 °C)
34 d/yr
Solar radiation
15.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.36 · 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
39.0 °C
25 June 1988
Coldest day
-30.6 °C
19 January 1994
Wettest day
87 mm
1 September 2003
Windiest day
54.0 km/h
15 December 1971
Strongest gust
112.3 km/h
18 January 1949
Hottest feels-like
44.3 °C
14 July 1995
Coldest feels-like
-38.6 °C
20 January 1985
Snowiest day
25.5 cm
13 February 2007
Sunniest day
14.5 h
11 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -1.2 °C | -2.3 °C | 44 mm | -27 mm |
| Feb | 3.4 °C | 0.0 °C | 54 mm | -13 mm |
| Mar | 14.5 °C | +5.0 °C | 132 mm | +32 mm |
| Apr | 17.6 °C | +1.2 °C | 149 mm | +42 mm |
| May | 21.2 °C | -0.7 °C | 83 mm | -27 mm |
| Jun | 28.5 °C | +1.8 °C | 108 mm | +8 mm |
| Jul | 30.2 °C | +1.9 °C | 127 mm | +37 mm |
| Aug | 27.3 °C | -0.3 °C | 40 mm | -37 mm |
| Sep | 27.0 °C | +2.6 °C | 41 mm | -27 mm |
| Oct | 20.2 °C | +2.2 °C | 39 mm | -33 mm |
| Nov | 10.9 °C | +0.9 °C | 47 mm | -38 mm |
| Dec | 3.7 °C | +0.2 °C | 49 mm | -26 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 Westfield?
Westfield has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 11.1 °C and it receives 1,022 mm of precipitation per year.
What is the hottest day ever recorded in Westfield?
The hottest day measured in Westfield between 1940 and 2025 was 25 June 1988, reaching 39.0 °C.
What is the coldest day in Westfield?
The coldest day measured in Westfield between 1940 and 2025 was 19 January 1994, at -30.6 °C.
Does it snow in Westfield?
Yes. Westfield gets on average 55.9 cm of snow per year and has around 106 frost days.
Has the climate of Westfield warmed?
Yes: Westfield warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Westfield?
The wettest day measured in Westfield between 1940 and 2025 was 1 September 2003, with 87 mm of rain in 24 hours.
What was the windiest day in Westfield?
The windiest day measured in Westfield between 1940 and 2025 was 15 December 1971, with winds reaching 54.0 km/h.
What is the warmest month in Westfield?
The warmest month in Westfield is July (23.5 °C on average); the coldest is January (-3.0 °C).
How much does it rain in Westfield?
Westfield receives on average 1,022 mm of precipitation per year, spread over about 123 rainy days.
Is it sunny in Westfield?
Westfield gets on average 8.8 hours of sunshine per day, roughly 3,212 hours per year over 1940-2025.
What is the biggest single-day snowfall in Westfield?
The heaviest 24-hour snowfall measured in Westfield between 1940 and 2025 was 13 February 2007, with 25.5 cm.
Are there tropical nights in Westfield?
Yes: Westfield has on average 34 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Westfield?
In Westfield, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 14 July 1995, and the lowest was -38.6 °C on 20 January 1985.
Compare Westfield with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Westfield