Griffith climate — normals and trends
Griffith (United States) has a hot-summer humid continental climate (Dfa) under the Köppen-Geiger classification. Its mean annual temperature is 10.1 °C and it receives 964 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 (23.3 °C on average) and the coldest is January (-4.5 °C). Rainfall peaks in May.
Griffith averages 113 frost days, 23 hot days (≥ 30 °C) and 122 rainy days per year.
Griffith has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 128 to 98 per year over the period.
The hottest day of the period reached 39.0 °C (on 14 July 1995) and the coldest -30.3 °C (on 20 January 1985).
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
GriffithIndiana
- coords
- 41.53°, -87.42°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.1°C
Average daily high
14.3°C
Average daily low
5.9°C
Annual rainfall
964mm
Sunshine / day
9.0h
Mean relative humidity
72%
Average peak wind
21.3km/h
Seasonal range
27.8°C
Frost days (< 0 °C)
113 d/yr
Hot days (≥ 30 °C)
23 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
72.0 cm
Average feels-like high
12.3 °C
Average feels-like low
2.8 °C
Average peak gust
40.5 km/h
Tropical nights (≥ 20 °C)
32 d/yr
Solar radiation
15.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.38 · 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
14 July 1995
Coldest day
-30.3 °C
20 January 1985
Wettest day
77 mm
25 June 2021
Windiest day
55.8 km/h
30 April 1984
Strongest gust
109.1 km/h
10 November 1998
Hottest feels-like
45.6 °C
14 July 1995
Coldest feels-like
-38.3 °C
20 January 1985
Snowiest day
24.4 cm
26 January 1967
Sunniest day
14.6 h
14 June 2014
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 | -0.9 °C | +0.1 °C | 33 mm | -25 mm |
| Feb | 1.7 °C | +0.7 °C | 24 mm | -29 mm |
| Mar | 12.4 °C | +5.6 °C | 99 mm | +18 mm |
| Apr | 14.9 °C | +1.1 °C | 95 mm | -8 mm |
| May | 18.4 °C | -1.7 °C | 109 mm | +5 mm |
| Jun | 27.1 °C | +1.4 °C | 158 mm | +59 mm |
| Jul | 28.7 °C | +1.0 °C | 155 mm | +64 mm |
| Aug | 26.3 °C | -0.6 °C | 93 mm | +10 mm |
| Sep | 25.2 °C | +1.9 °C | 34 mm | -44 mm |
| Oct | 18.9 °C | +2.0 °C | 112 mm | +35 mm |
| Nov | 9.5 °C | +0.8 °C | 66 mm | -8 mm |
| Dec | 1.4 °C | -0.5 °C | 65 mm | +0 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 Griffith?
Griffith has a hot-summer humid continental climate (Köppen Dfa). Over 1940-2025, the average annual temperature is 10.1 °C and it receives 964 mm of precipitation per year.
What is the hottest day ever recorded in Griffith?
The hottest day measured in Griffith between 1940 and 2025 was 14 July 1995, reaching 39.0 °C.
What is the coldest day in Griffith?
The coldest day measured in Griffith between 1940 and 2025 was 20 January 1985, at -30.3 °C.
Does it snow in Griffith?
Yes. Griffith gets on average 72.0 cm of snow per year and has around 113 frost days.
Has the climate of Griffith warmed?
Yes: Griffith warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Griffith?
The wettest day measured in Griffith between 1940 and 2025 was 25 June 2021, with 77 mm of rain in 24 hours.
What was the windiest day in Griffith?
The windiest day measured in Griffith between 1940 and 2025 was 30 April 1984, with winds reaching 55.8 km/h.
What is the warmest month in Griffith?
The warmest month in Griffith is July (23.3 °C on average); the coldest is January (-4.5 °C).
How much does it rain in Griffith?
Griffith receives on average 964 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Griffith?
Griffith gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
What is the biggest single-day snowfall in Griffith?
The heaviest 24-hour snowfall measured in Griffith between 1940 and 2025 was 26 January 1967, with 24.4 cm.
Are there tropical nights in Griffith?
Yes: Griffith has on average 32 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Griffith?
In Griffith, between 1940 and 2025, the highest apparent temperature reached 45.6 °C on 14 July 1995, and the lowest was -38.3 °C on 20 January 1985.
Compare Griffith with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Griffith