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Saint Martin climate
Typical historical weather for Saint Martin, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
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Annual average
20.7°C
across all months
Warmest month
32°C
Aug average high
Coolest month
6.4°C
Jan average low
Annual rainfall
1566mm
total per year
Saint Martin is typically hottest in August and coolest in January, a swing of about 25.6°C across the year. About 36% of annual rainfall falls in the three wettest months (August is typically wettest, November driest).
Monthly averages
Average daily high/low temperature (band) and monthly rainfall (bars).
| Month | Avg high | Avg low | Rainfall | Wet days | Humidity | Wind | Cloud | Solar |
|---|---|---|---|---|---|---|---|---|
| Jan | 16.3°C · record 21.5–25.8°C | 6.4°C · record -9.9–-0.1°C | 116mm | 10 | 73% | 3.4 m/s | 54% | 3.1 kWh/m² |
| Feb | 19.7°C · record 23.3–27°C | 10.2°C · record -5.4–4.5°C | 104mm | 11 | 76% | 3.4 m/s | 58% | 3.6 kWh/m² |
| Mar | 22.6°C · record 26.1–29.9°C | 13.1°C · record -0.6–6°C | 120mm | 12 | 73% | 3.5 m/s | 57% | 4.6 kWh/m² |
| Apr | 25°C · record 27.8–31.5°C | 15.5°C · record 4.8–8.8°C | 108mm | 10 | 73% | 3.3 m/s | 52% | 5.8 kWh/m² |
| May | 28.7°C · record 29.9–34.4°C | 20.2°C · record 9.1–18.9°C | 140mm | 13 | 76% | 2.8 m/s | 54% | 6.1 kWh/m² |
| Jun | 31.3°C · record 31.5–37.2°C | 23.7°C · record 17.8–21.6°C | 182mm | 19 | 79% | 2.5 m/s | 61% | 5.9 kWh/m² |
| Jul | 31.8°C · record 32.9–36.7°C | 24.7°C · record 21.2–23.6°C | 185mm | 22 | 82% | 2.1 m/s | 63% | 5.7 kWh/m² |
| Aug | 32°C · record 33.3–39.5°C | 24.5°C · record 21.2–23.3°C | 199mm | 22 | 82% | 2.1 m/s | 61% | 5.3 kWh/m² |
| Sep | 30.9°C · record 32.1–36.5°C | 22.1°C · record 10.1–21.9°C | 125mm | 12 | 78% | 2.3 m/s | 46% | 5 kWh/m² |
| Oct | 27.2°C · record 30.7–34.7°C | 16.9°C · record 1.9–9.8°C | 91mm | 8 | 74% | 2.8 m/s | 41% | 4.4 kWh/m² |
| Nov | 21.8°C · record 25.7–30.1°C | 11.1°C · record -3–4.8°C | 79mm | 8 | 75% | 3 m/s | 49% | 3.3 kWh/m² |
| Dec | 18.1°C · record 23.5–26.6°C | 8.9°C · record -5.6–2.7°C | 117mm | 11 | 78% | 3.1 m/s | 58% | 2.6 kWh/m² |
"Avg high"/"Avg low" is the mean daily high/low for that month, averaged across every year on file. The "record" figure alongside it is a different statistic — the single hottest (or coldest) hour ever recorded during that month across all years — so it can sit above or below the average and does not describe the average's year-to-year spread. A "wet day" is any day with at least 1.0mm of rain.
Year to year
Annual average temperature, 2016–2025.
Across these 10 years, the annual average has moved by about +0.16°C per decade. That’s a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
Annual rainfall has moved by about -245.64mm per decade over the same period.
2025 (the most recent year on file) averaged 20.5318687264778°C, below the 9-year baseline of 20.78°C by 0.64 standard deviations.
Typical extremes per year
Rainy days
156.4 days
≥1.0mm rain
Heavy rain days
20.2 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
7.8 days
daily low ≤0°C
Averaged across 10 years on file. Thresholds match PastClimate's data pipeline definitions — see data & sources.
Records on file
Ranked across 10 years of data currently on file (2016–2025).
Hottest day
39.5°C
26 August 2023
2023 was 2.8 SD above the 9-year average that year
Coldest day
-9.9°C
22 January 2025
2025 was 0.64 SD below the 9-year average that year
Wettest day
111.4mm
20 June 2017
2017 was 0.59 SD above the 9-year average that year
Windiest day
9.2m/s
15 September 2020
2020 was 0.52 SD above the 9-year average that year
See the detail: Saint Martin on 20 June 2017.
Nearby cities
Ocean Springs
Same ERA5 grid cell
Gulf Hills
Same ERA5 grid cell
Latimer
Same ERA5 grid cell
Vancleave
Same ERA5 grid cell
Gulf Park Estates
Same ERA5 grid cell
Hickory Hills
Same ERA5 grid cell
Want a side-by-side view instead? Compare Saint Martin with another city.
Frequently asked questions about Saint Martin's climate
What is the hottest month in Saint Martin?
August is typically the warmest month in Saint Martin, with an average high of 32°C. January is typically the coolest, averaging 6.4°C overnight.
How much does it rain in Saint Martin?
Saint Martin gets about 1566mm of rain a year on average, with roughly 36% of it falling in the three wettest months (August is typically the wettest, November the driest).
How many extremely hot or cold days does Saint Martin have?
On average, Saint Martin sees about 0 day(s) a year at or above 40°C and about 7.8 day(s) at or below 0°C, based on 10 years of data.
Is Saint Martin getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.16°C per decade. That's a short window for a reliable long-term climate trend — treat it as indicative, not definitive.
What is the hottest day on record for Saint Martin?
The hottest day on file is 26 August 2023 at 39.5°C, out of 10 year(s) searched.
Data & provenance
↓ Download monthly CSVData source & coverage — ERA5 reanalysis, 2016–2025 (10 years)details
- Source
- ERA5 reanalysis, accessed via the Copernicus Climate Change Service (C3S) Climate Data Store
- Data type
- Reanalysis — a physically consistent reconstruction combining a forecast model with historical observations, not a live station reading or a forecast
- Coverage
- 2016–2025 (10 years) for United States
- Location
- Saint Martin — 30.500°, -88.750°, ERA5 grid cell center, 13.3 km from requested point
- Time zone
- America/Chicago
- What's shown here
- Monthly and annual averages, and dated extreme-value records, derived from an hourly base record.
- Spatial resolution
- 0.25° (~25 km) distributed grid — ERA5's native model resolution is finer; this is the publicly distributed regridded product
- Version / refreshed
- Methodology v2026.07 · data last refreshed December 31, 2025
- Limitations
- A model reconstruction, not a station observation — hyper-local extremes (a single storm cell, an urban heat pocket) can differ from a nearby gauge. See the full methodology.
- Attribution
- Generated using Copernicus Climate Change Service information
Cite this data
PastClimate (2026-07-18). Historical climate data for Saint Martin, United States (30.50°N, 88.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Saint Martin, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Saint Martin, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 18, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Saint Martin, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-18},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.