Zachary climate — normals and trends
Zachary (United States) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 19.3 °C and it receives 1,283 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 (27.1 °C on average) and the coldest is January (9.9 °C). Rainfall peaks in March.
Zachary averages 16 frost days, 112 hot days (≥ 30 °C) and 131 rainy days per year.
Zachary has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 41.0 °C (on 30 August 2000) and the coldest -13.2 °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
ZacharyLouisiana
- coords
- 30.65°, -91.16°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
19.3°C
Average daily high
24.8°C
Average daily low
14.5°C
Annual rainfall
1,283mm
Sunshine / day
9.5h
Mean relative humidity
75%
Average peak wind
14.2km/h
Seasonal range
17.2°C
Frost days (< 0 °C)
16 d/yr
Hot days (≥ 30 °C)
112 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
1.0 cm
Average feels-like high
26.2 °C
Average feels-like low
14.6 °C
Average peak gust
32.7 km/h
Tropical nights (≥ 20 °C)
128 d/yr
Solar radiation
16.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.25 · 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
41.0 °C
30 August 2000
Coldest day
-13.2 °C
23 December 1989
Wettest day
407 mm
13 August 2016
Windiest day
66.5 km/h
1 September 2008
Strongest gust
162.7 km/h
1 September 2008
Hottest feels-like
46.2 °C
24 August 2023
Coldest feels-like
-20.1 °C
23 December 1989
Snowiest day
12.5 cm
11 December 2008
Sunniest day
13.9 h
13 June 2024
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 | 13.6 °C | -1.7 °C | 110 mm | -14 mm |
| Feb | 19.8 °C | +2.4 °C | 105 mm | -7 mm |
| Mar | 24.0 °C | +2.9 °C | 106 mm | -21 mm |
| Apr | 27.0 °C | +2.1 °C | 100 mm | -16 mm |
| May | 28.8 °C | +0.1 °C | 167 mm | +63 mm |
| Jun | 31.6 °C | 0.0 °C | 103 mm | +6 mm |
| Jul | 32.7 °C | +0.5 °C | 118 mm | -1 mm |
| Aug | 33.4 °C | +1.0 °C | 62 mm | -48 mm |
| Sep | 32.8 °C | +2.4 °C | 31 mm | -62 mm |
| Oct | 28.4 °C | +2.1 °C | 143 mm | +74 mm |
| Nov | 22.7 °C | +2.1 °C | 28 mm | -68 mm |
| Dec | 18.3 °C | +1.5 °C | 94 mm | -23 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 Zachary?
Zachary has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 19.3 °C and it receives 1,283 mm of precipitation per year.
What is the hottest day ever recorded in Zachary?
The hottest day measured in Zachary between 1940 and 2025 was 30 August 2000, reaching 41.0 °C.
What is the coldest day in Zachary?
The coldest day measured in Zachary between 1940 and 2025 was 23 December 1989, at -13.2 °C.
Does it snow in Zachary?
Almost never: Zachary sees virtually no snow, with about 16 frost days per year.
Has the climate of Zachary warmed?
Yes: Zachary warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Zachary?
The wettest day measured in Zachary between 1940 and 2025 was 13 August 2016, with 407 mm of rain in 24 hours.
What was the windiest day in Zachary?
The windiest day measured in Zachary between 1940 and 2025 was 1 September 2008, with winds reaching 66.5 km/h.
What is the warmest month in Zachary?
The warmest month in Zachary is July (27.1 °C on average); the coldest is January (9.9 °C).
How much does it rain in Zachary?
Zachary receives on average 1,283 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Zachary?
Zachary gets on average 9.5 hours of sunshine per day, roughly 3,468 hours per year over 1940-2025.
What is the biggest single-day snowfall in Zachary?
The heaviest 24-hour snowfall measured in Zachary between 1940 and 2025 was 11 December 2008, with 12.5 cm.
Are there tropical nights in Zachary?
Yes: Zachary has on average 128 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Zachary?
In Zachary, between 1940 and 2025, the highest apparent temperature reached 46.2 °C on 24 August 2023, and the lowest was -20.1 °C on 23 December 1989.
Compare Zachary with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Zachary