Home / United States / Altamonte Springs
Altamonte Springs climate
Typical historical weather for Altamonte Springs, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Want today's actual conditions instead? See the current forecast for Altamonte Springs. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
22.7°C
across all months
Warmest month
32.3°C
Jul average high
Coolest month
10.2°C
Jan average low
Annual rainfall
1270mm
total per year
Altamonte Springs is typically hottest in July and coolest in January, a swing of about 22.1°C across the year. About 46% 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 | 20.7°C · record 26.4–29.2°C | 10.2°C · record -2.9–3.1°C | 60mm | 7 | 73% | 3 m/s | 55% | 3.2 kWh/m² |
| Feb | 24.1°C · record 27.9–30.7°C | 13.5°C · record 0.9–8.6°C | 53mm | 7 | 74% | 2.9 m/s | 52% | 3.9 kWh/m² |
| Mar | 25.6°C · record 29–31.9°C | 14.9°C · record 2.8–9.5°C | 44mm | 6 | 69% | 3 m/s | 50% | 5 kWh/m² |
| Apr | 27.5°C · record 30.4–34.2°C | 17.4°C · record 7.3–12.2°C | 72mm | 8 | 69% | 3 m/s | 49% | 5.8 kWh/m² |
| May | 30°C · record 31.6–34.9°C | 20.6°C · record 11.8–18.3°C | 102mm | 12 | 72% | 2.6 m/s | 51% | 6.2 kWh/m² |
| Jun | 31.5°C · record 33–35.7°C | 23.6°C · record 19.2–22.5°C | 168mm | 22 | 78% | 2.2 m/s | 68% | 5.7 kWh/m² |
| Jul | 32.3°C · record 33.3–36.3°C | 24.5°C · record 21.8–24°C | 185mm | 25 | 79% | 1.9 m/s | 69% | 5.7 kWh/m² |
| Aug | 32.2°C · record 33.3–35.5°C | 24.8°C · record 22–23.8°C | 208mm | 26 | 81% | 2.1 m/s | 71% | 5.3 kWh/m² |
| Sep | 31°C · record 32.3–34.5°C | 23.6°C · record 17.7–22.9°C | 192mm | 21 | 81% | 2.3 m/s | 66% | 4.6 kWh/m² |
| Oct | 28.3°C · record 30.3–32.9°C | 20.5°C · record 7.3–18.4°C | 100mm | 12 | 78% | 2.8 m/s | 52% | 4 kWh/m² |
| Nov | 24.9°C · record 27.7–30°C | 15.7°C · record 1.5–13.6°C | 38mm | 6 | 77% | 2.7 m/s | 54% | 3.3 kWh/m² |
| Dec | 22.7°C · record 26.4–29.7°C | 12.8°C · record -2.4–6.7°C | 48mm | 7 | 77% | 2.7 m/s | 54% | 2.9 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 -0.08°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 -180.43mm per decade over the same period.
2025 (the most recent year on file) averaged 22.425412711923002°C, below the 9-year baseline of 22.79°C by 1.49 standard deviations.
Typical extremes per year
Rainy days
157.5 days
≥1.0mm rain
Heavy rain days
10.3 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
0.6 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
36.3°C
28 July 2016
2016 was 0.58 SD below the 9-year average that year
Coldest day
-2.9°C
18 January 2018
2018 was 1.45 SD below the 9-year average that year
Wettest day
169.2mm
9 October 2024
2024 was 0.47 SD below the 9-year average that year
Windiest day
11.7m/s
7 October 2016
2016 was 0.58 SD below the 9-year average that year
See the detail: Altamonte Springs on 9 October 2024.
Nearby cities
Sanford
Same ERA5 grid cell
Oviedo
Same ERA5 grid cell
Winter Springs
Same ERA5 grid cell
Casselberry
Same ERA5 grid cell
Maitland
Same ERA5 grid cell
Lake Mary
Same ERA5 grid cell
Want a side-by-side view instead? Compare Altamonte Springs with another city.
Frequently asked questions about Altamonte Springs's climate
What is the hottest month in Altamonte Springs?
July is typically the warmest month in Altamonte Springs, with an average high of 32.3°C. January is typically the coolest, averaging 10.2°C overnight.
How much does it rain in Altamonte Springs?
Altamonte Springs gets about 1270mm of rain a year on average, with roughly 46% of it falling in the three wettest months (August is typically the wettest, November the driest).
How many extremely hot or cold days does Altamonte Springs have?
On average, Altamonte Springs sees about 0 day(s) a year at or above 40°C and about 0.6 day(s) at or below 0°C, based on 10 years of data.
Is Altamonte Springs getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about -0.08°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 Altamonte Springs?
The hottest day on file is 28 July 2016 at 36.3°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
- Altamonte Springs — 28.750°, -81.250°, ERA5 grid cell center, 15.0 km from requested point
- Time zone
- America/New_York
- 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 (2026-07-17). Historical climate data for Altamonte Springs, United States (28.75°N, 81.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Altamonte Springs, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Altamonte Springs, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 17, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Altamonte Springs, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-17},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.