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Sewickley climate
Typical historical weather for Sewickley, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
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Annual average
12°C
across all months
Warmest month
28.9°C
Jul average high
Coolest month
-4.5°C
Jan average low
Annual rainfall
1271mm
total per year
Sewickley is typically hottest in July and coolest in January, a swing of about 33.4°C across the year. About 29% of annual rainfall falls in the three wettest months (May 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 | 2.8°C · record 9.4°C–21.3°C | -4.5°C · record -27.2°C–-7°C | 98mm | 13 | 72% | 3.4 m/s | 78% | 1.8 kWh/m² |
| Feb | 6.7°C · record 15°C–24.7°C | -2.5°C · record -17.1°C–-8.9°C | 107mm | 13 | 67% | 3.4 m/s | 73% | 2.7 kWh/m² |
| Mar | 11.4°C · record 17°C–26.1°C | 1.2°C · record -16.7°C–-4.7°C | 104mm | 14 | 62% | 3.5 m/s | 67% | 3.8 kWh/m² |
| Apr | 16.7°C · record 23.4°C–28.9°C | 6.1°C · record -6.8°C–-0.8°C | 116mm | 15 | 63% | 3.2 m/s | 68% | 4.9 kWh/m² |
| May | 21.8°C · record 27.6°C–31.4°C | 11.8°C · record -1.5°C–6.9°C | 138mm | 16 | 71% | 2.8 m/s | 68% | 5.5 kWh/m² |
| Jun | 26.5°C · record 30.6°C–35.3°C | 16.4°C · record 5.3°C–10.1°C | 121mm | 15 | 70% | 2.6 m/s | 61% | 6.1 kWh/m² |
| Jul | 28.9°C · record 31.3°C–34.8°C | 19.1°C · record 11.7°C–15.6°C | 115mm | 15 | 73% | 2.2 m/s | 58% | 5.9 kWh/m² |
| Aug | 27.9°C · record 30.7°C–34.1°C | 18°C · record 7.8°C–14.6°C | 89mm | 13 | 73% | 2.2 m/s | 56% | 5.2 kWh/m² |
| Sep | 25.1°C · record 29.2°C–34.5°C | 14.6°C · record 4.7°C–9.8°C | 106mm | 10 | 74% | 2.4 m/s | 52% | 4.3 kWh/m² |
| Oct | 18.5°C · record 23.4°C–31.7°C | 8.5°C · record -1°C–4.9°C | 104mm | 12 | 73% | 2.9 m/s | 56% | 3.1 kWh/m² |
| Nov | 10.7°C · record 16.8°C–26.4°C | 1.9°C · record -13.3°C–-2.1°C | 81mm | 10 | 68% | 3.2 m/s | 63% | 2.1 kWh/m² |
| Dec | 5.6°C · record 13.8°C–18°C | -1.4°C · record -19.7°C–-5.4°C | 93mm | 12 | 72% | 3.3 m/s | 78% | 1.5 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°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 -290.88mm per decade over the same period.
2025 (the most recent year on file) averaged 11.3°C, below the 9-year baseline of 12.1°C by 1.9 standard deviations.
Typical extremes per year
Rainy days
156.5 days
≥1.0mm rain
Heavy rain days
12.5 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
90.4 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
35.3°C
21 June 2024
2024 was 2.35 SD above the 9-year average that year
Coldest day
-27.2°C
22 January 2025
2025 was 1.9 SD below the 9-year average that year
Wettest day
109.5mm
9 September 2018
2018 was 1.19 SD below the 9-year average that year
Windiest day
7.8m/s
29 December 2025
2025 was 1.9 SD below the 9-year average that year
See the detail: Sewickley on 9 September 2018.
Nearby cities
Carnot-Moon
Same ERA5 grid cell
Economy
Same ERA5 grid cell
Ambridge
Same ERA5 grid cell
Coraopolis
Same ERA5 grid cell
Imperial
Same ERA5 grid cell
Pittsburgh
21.1 km away
Want a side-by-side view instead? Compare Sewickley with another city.
Frequently asked questions about Sewickley's climate
What is the hottest month in Sewickley?
July is typically the warmest month in Sewickley, with an average high of 28.9°C. January is typically the coolest, averaging -4.5°C overnight.
How much does it rain in Sewickley?
Sewickley gets about 1271mm of rain a year on average, with roughly 29% of it falling in the three wettest months (May is typically the wettest, November the driest).
How many extremely hot or cold days does Sewickley have?
On average, Sewickley sees about 0 day(s) a year at or above 40°C and about 90.4 day(s) at or below 0°C, based on 10 years of data.
Is Sewickley getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about -0.03°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 Sewickley?
The hottest day on file is 21 June 2024 at 35.3°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
- Sewickley — 40.500°, -80.250°, ERA5 grid cell center, 6.9 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 (2026-07-19). Historical climate data for Sewickley, United States (40.50°N, 80.25°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Sewickley, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 19, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Sewickley, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 19, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for Sewickley, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-19},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.