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Rochester climate
Typical historical weather for Rochester, 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 Rochester. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
10°C
across all months
Warmest month
27.9°C
Jul average high
Coolest month
-6.6°C
Jan average low
Annual rainfall
977mm
total per year
Rochester is typically hottest in July and coolest in January, a swing of about 34.5°C across the year. About 31% of annual rainfall falls in the three wettest months (July 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 | -0.3°C · record 4–13.6°C | -6.6°C · record -26.4–-13.5°C | 66mm | 11 | 75% | 3.8 m/s | 78% | 1.6 kWh/m² |
| Feb | 2.4°C · record 10.7–21.8°C | -6.1°C · record -23.3–-8.8°C | 64mm | 10 | 71% | 4 m/s | 72% | 2.7 kWh/m² |
| Mar | 7.8°C · record 13.2–23°C | -1.5°C · record -16.1–-7.2°C | 80mm | 11 | 66% | 4 m/s | 67% | 3.8 kWh/m² |
| Apr | 13.5°C · record 21.1–29.2°C | 3.4°C · record -6.6–0.4°C | 99mm | 14 | 63% | 3.8 m/s | 66% | 4.9 kWh/m² |
| May | 20.5°C · record 27.9–33.6°C | 9.8°C · record -2.6–5.9°C | 92mm | 12 | 64% | 3.4 m/s | 63% | 5.8 kWh/m² |
| Jun | 25.9°C · record 30.6–35.5°C | 15.4°C · record 5.6–9.1°C | 95mm | 12 | 64% | 3.2 m/s | 55% | 6.5 kWh/m² |
| Jul | 27.9°C · record 30.7–34.8°C | 18.1°C · record 10.1–14.8°C | 106mm | 13 | 70% | 2.7 m/s | 51% | 6.2 kWh/m² |
| Aug | 26.6°C · record 29.9–33.3°C | 16.9°C · record 6.9–13.8°C | 90mm | 11 | 73% | 2.8 m/s | 52% | 5.5 kWh/m² |
| Sep | 23.3°C · record 29.2–33.6°C | 13.3°C · record 1.7–8.7°C | 75mm | 10 | 75% | 3 m/s | 52% | 4.2 kWh/m² |
| Oct | 16.4°C · record 24.1–29.6°C | 7.3°C · record -3.2–2°C | 90mm | 12 | 74% | 3.6 m/s | 60% | 2.9 kWh/m² |
| Nov | 8.1°C · record 12.1–24.6°C | 0.9°C · record -13.3–-4.4°C | 58mm | 10 | 73% | 3.9 m/s | 66% | 1.9 kWh/m² |
| Dec | 2.5°C · record 10.9–17.7°C | -3.3°C · record -22.5–-3.9°C | 62mm | 10 | 76% | 3.8 m/s | 78% | 1.4 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 +0.26°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 -126.11mm per decade over the same period.
2025 (the most recent year on file) averaged 9.381457592689848°C, below the 9-year baseline of 10.11°C by 1.23 standard deviations.
Typical extremes per year
Rainy days
135.1 days
≥1.0mm rain
Heavy rain days
7.9 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
116.4 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
35.5°C
21 June 2022
2022 was 0.72 SD below the 9-year average that year
Coldest day
-26.4°C
31 January 2019
2019 was 1.88 SD below the 9-year average that year
Wettest day
77.4mm
10 July 2024
2024 was 2.2 SD above the 9-year average that year
Windiest day
9.2m/s
23 December 2022
2022 was 0.72 SD below the 9-year average that year
See the detail: Rochester on 10 July 2024.
Nearby cities
Rochester Hills
Same ERA5 grid cell
Pontiac
Same ERA5 grid cell
Auburn Hills
Same ERA5 grid cell
Oxford
Same ERA5 grid cell
Lake Orion
Same ERA5 grid cell
Waterford
20.4 km away
Want a side-by-side view instead? Compare Rochester with another city.
Frequently asked questions about Rochester's climate
What is the hottest month in Rochester?
July is typically the warmest month in Rochester, with an average high of 27.9°C. January is typically the coolest, averaging -6.6°C overnight.
How much does it rain in Rochester?
Rochester gets about 977mm of rain a year on average, with roughly 31% of it falling in the three wettest months (July is typically the wettest, November the driest).
How many extremely hot or cold days does Rochester have?
On average, Rochester sees about 0 day(s) a year at or above 40°C and about 116.4 day(s) at or below 0°C, based on 10 years of data.
Is Rochester getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.26°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 Rochester?
The hottest day on file is 21 June 2022 at 35.5°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
- Rochester — 42.750°, -83.250°, ERA5 grid cell center, 12.2 km from requested point
- Time zone
- America/Detroit
- 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 Rochester, United States (42.75°N, 83.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Rochester, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Rochester, 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 Rochester, 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.