Opelousas climate — normals and trends
Opelousas (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 19.7 °C and it receives 1,294 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 (27.3 °C on average) and the coldest is January (10.4 °C). Rainfall peaks in January.
Opelousas averages 13 frost days, 118 hot days (≥ 30 °C) and 132 rainy days per year.
Opelousas has warmed by +1.5 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.6 °C (on 27 August 2023) and the coldest -12.5 °C (on 23 December 1989).
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
OpelousasLouisiana
- coords
- 30.53°, -92.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
19.7°C
Average daily high
25.1°C
Average daily low
14.9°C
Annual rainfall
1,294mm
Sunshine / day
9.4h
Mean relative humidity
75%
Average peak wind
15.7km/h
Seasonal range
16.9°C
Frost days (< 0 °C)
13 d/yr
Hot days (≥ 30 °C)
118 d/yr
Rainy days (≥ 1 mm)
132 d/yr
Annual snowfall
0.8 cm
Average feels-like high
26.5 °C
Average feels-like low
15.0 °C
Average peak gust
33.8 km/h
Tropical nights (≥ 20 °C)
134 d/yr
Solar radiation
16.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.33 · 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
41.6 °C
27 August 2023
Coldest day
-12.5 °C
23 December 1989
Wettest day
190 mm
25 October 2015
Windiest day
69.1 km/h
1 September 2008
Strongest gust
144.7 km/h
1 September 2008
Hottest feels-like
47.0 °C
24 August 2023
Coldest feels-like
-19.6 °C
23 December 1989
Snowiest day
12.3 cm
11 December 2008
Sunniest day
13.8 h
21 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 | 14.1 °C | -1.6 °C | 121 mm | -4 mm |
| Feb | 20.0 °C | +2.3 °C | 107 mm | -2 mm |
| Mar | 24.5 °C | +3.0 °C | 131 mm | +14 mm |
| Apr | 27.5 °C | +2.2 °C | 80 mm | -31 mm |
| May | 29.6 °C | +0.6 °C | 162 mm | +50 mm |
| Jun | 32.2 °C | +0.5 °C | 118 mm | +17 mm |
| Jul | 33.3 °C | +1.0 °C | 119 mm | -3 mm |
| Aug | 34.4 °C | +1.8 °C | 80 mm | -31 mm |
| Sep | 33.7 °C | +3.1 °C | 35 mm | -61 mm |
| Oct | 29.5 °C | +2.8 °C | 78 mm | -4 mm |
| Nov | 24.0 °C | +2.9 °C | 28 mm | -68 mm |
| Dec | 19.0 °C | +1.7 °C | 113 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 Opelousas?
Opelousas has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.7 °C and it receives 1,294 mm of precipitation per year.
What is the hottest day ever recorded in Opelousas?
The hottest day measured in Opelousas between 1940 and 2025 was 27 August 2023, reaching 41.6 °C.
What is the coldest day in Opelousas?
The coldest day measured in Opelousas between 1940 and 2025 was 23 December 1989, at -12.5 °C.
Does it snow in Opelousas?
Almost never: Opelousas sees virtually no snow, with about 13 frost days per year.
Has the climate of Opelousas warmed?
Yes: Opelousas warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Opelousas?
The wettest day measured in Opelousas between 1940 and 2025 was 25 October 2015, with 190 mm of rain in 24 hours.
What was the windiest day in Opelousas?
The windiest day measured in Opelousas between 1940 and 2025 was 1 September 2008, with winds reaching 69.1 km/h.
What is the warmest month in Opelousas?
The warmest month in Opelousas is July (27.3 °C on average); the coldest is January (10.4 °C).
How much does it rain in Opelousas?
Opelousas receives on average 1,294 mm of precipitation per year, spread over about 132 rainy days.
Is it sunny in Opelousas?
Opelousas gets on average 9.4 hours of sunshine per day, roughly 3,431 hours per year over 1940-2025.
What is the biggest single-day snowfall in Opelousas?
The heaviest 24-hour snowfall measured in Opelousas between 1940 and 2025 was 11 December 2008, with 12.3 cm.
Are there tropical nights in Opelousas?
Yes: Opelousas has on average 134 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Opelousas?
In Opelousas, between 1940 and 2025, the highest apparent temperature reached 47.0 °C on 24 August 2023, and the lowest was -19.6 °C on 23 December 1989.
Compare Opelousas with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Opelousas