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Sterling climate
Typical historical weather for Sterling, 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 Sterling.
Annual average
10.1°C
across all months
Warmest month
18°C
Aug average high
Coolest month
4.3°C
Feb average low
Annual rainfall
1911mm
total per year
Sterling is typically hottest in August and coolest in February, a swing of about 13.7°C across the year. About 47% of annual rainfall falls in the three wettest months (November is typically wettest, July 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 | 8.3°C · record 10.1–14.3°C | 5.3°C · record -5.9–3.1°C | 289mm | 20 | 86% | 4.8 m/s | 81% | 1 kWh/m² |
| Feb | 7.6°C · record 9.6–13.6°C | 4.3°C · record -2.2–4.1°C | 174mm | 18 | 81% | 4.5 m/s | 75% | 1.9 kWh/m² |
| Mar | 9.4°C · record 11.2–18.4°C | 5.2°C · record -0.3–4.4°C | 202mm | 19 | 80% | 3.9 m/s | 73% | 3.1 kWh/m² |
| Apr | 11.5°C · record 14.1–22.5°C | 6.7°C · record 1.5–6°C | 141mm | 16 | 77% | 3.5 m/s | 71% | 4.6 kWh/m² |
| May | 13.9°C · record 15–25.7°C | 8.7°C · record 5–6.9°C | 66mm | 10 | 80% | 3 m/s | 69% | 5.9 kWh/m² |
| Jun | 15.4°C · record 17.7–31.8°C | 10.4°C · record 6.4–8°C | 53mm | 10 | 83% | 2.9 m/s | 70% | 6.3 kWh/m² |
| Jul | 16.9°C · record 18.9–24.3°C | 11.4°C · record 8.5–10.4°C | 20mm | 4 | 87% | 2.6 m/s | 67% | 6.4 kWh/m² |
| Aug | 18°C · record 23.8–29.4°C | 12°C · record 8–10.7°C | 34mm | 6 | 87% | 2.4 m/s | 65% | 5.4 kWh/m² |
| Sep | 16.5°C · record 19.6–26.2°C | 11.2°C · record 4.8–9°C | 98mm | 10 | 86% | 2.6 m/s | 64% | 3.8 kWh/m² |
| Oct | 13.3°C · record 14.1–21.5°C | 8.8°C · record 2.5–6.8°C | 216mm | 16 | 85% | 3.7 m/s | 66% | 2.3 kWh/m² |
| Nov | 10.3°C · record 12.1–17.6°C | 7.1°C · record 0.6–6°C | 316mm | 20 | 85% | 4.6 m/s | 78% | 1.2 kWh/m² |
| Dec | 8.2°C · record 10.9–14.1°C | 5.4°C · record -4.6–4.4°C | 302mm | 21 | 86% | 4.7 m/s | 81% | 0.8 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 -0.3°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 -378.82mm per decade over the same period.
2025 (the most recent year on file) averaged 10.12372223318442°C, below the 9-year baseline of 10.17°C by 0.14 standard deviations.
Typical extremes per year
Rainy days
169.1 days
≥1.0mm rain
Heavy rain days
28.4 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
5.2 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
31.8°C
28 June 2021
2021 was 1.45 SD below the 9-year average that year
Coldest day
-5.9°C
12 January 2024
2024 was 0.13 SD above the 9-year average that year
Wettest day
69.2mm
19 October 2024
2024 was 0.13 SD above the 9-year average that year
Windiest day
11.3m/s
8 December 2016
2016 was 3.29 SD above the 9-year average that year
See the detail: Sterling on 19 October 2024.
Nearby cities
Anchorage
Same ERA5 grid cell
Fairbanks
Same ERA5 grid cell
Juneau
Same ERA5 grid cell
Eagle River
Same ERA5 grid cell
Badger
Same ERA5 grid cell
Knik-Fairview
Same ERA5 grid cell
Want a side-by-side view instead? Compare Sterling with another city.
Frequently asked questions about Sterling's climate
What is the hottest month in Sterling?
August is typically the warmest month in Sterling, with an average high of 18°C. February is typically the coolest, averaging 4.3°C overnight.
How much does it rain in Sterling?
Sterling gets about 1911mm of rain a year on average, with roughly 47% of it falling in the three wettest months (November is typically the wettest, July the driest).
How many extremely hot or cold days does Sterling have?
On average, Sterling sees about 0 day(s) a year at or above 40°C and about 5.2 day(s) at or below 0°C, based on 10 years of data.
Is Sterling getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about -0.3°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 Sterling?
The hottest day on file is 28 June 2021 at 31.8°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
- Sterling — 48.250°, -124.500°, ERA5 grid cell center, 2156.1 km from requested point
- Time zone
- America/Los_Angeles
- 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 Sterling, United States (48.25°N, 124.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Sterling, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Sterling, 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 Sterling, 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.