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New Britain climate
Typical historical weather for New Britain, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
Data last updated: 31 December 2025
Want today's actual conditions instead? See the current forecast for New Britain. Planning a garden? See the gardening & growing season planner. Or browse the 365-day climate calendar.
Annual average
11.4°C
across all months
Warmest month
29.2°C
Jul average high
Coolest month
-4.9°C
Jan average low
Annual rainfall
1220mm
total per year
New Britain is typically hottest in July and coolest in January, a swing of about 34.1°C across the year. About 30% of annual rainfall falls in the three wettest months (July is typically wettest, June 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 | 3.3°C · record 9.5°C–19.6°C | -4.9°C · record -23.1°C–-4.3°C | 86mm | 9 | 65% | 3.2 m/s | 58% | 2 kWh/m² |
| Feb | 5.3°C · record 9°C–22.7°C | -4°C · record -25.5°C–-12.3°C | 82mm | 10 | 65% | 3.1 m/s | 60% | 2.9 kWh/m² |
| Mar | 9.7°C · record 15.8°C–25.3°C | -0.1°C · record -20°C–-5.4°C | 101mm | 11 | 58% | 3.4 m/s | 58% | 4.1 kWh/m² |
| Apr | 15.1°C · record 18.3°C–33.7°C | 4.8°C · record -9.2°C–0.7°C | 108mm | 12 | 61% | 3.2 m/s | 64% | 4.9 kWh/m² |
| May | 20.9°C · record 26.8°C–34.3°C | 10.5°C · record 0.4°C–6.3°C | 109mm | 13 | 66% | 2.8 m/s | 66% | 5.5 kWh/m² |
| Jun | 26.2°C · record 31.5°C–37.7°C | 15.3°C · record 6.1°C–10.9°C | 82mm | 11 | 67% | 2.6 m/s | 60% | 6.1 kWh/m² |
| Jul | 29.2°C · record 32.5°C–37.4°C | 19.2°C · record 12°C–15.7°C | 134mm | 13 | 72% | 2.3 m/s | 58% | 5.9 kWh/m² |
| Aug | 28.1°C · record 29.6°C–35.7°C | 17.9°C · record 8.1°C–12.9°C | 89mm | 11 | 72% | 2.3 m/s | 57% | 5.3 kWh/m² |
| Sep | 24.1°C · record 28.3°C–35.2°C | 13.9°C · record 2.9°C–9°C | 117mm | 9 | 74% | 2.5 m/s | 58% | 4.1 kWh/m² |
| Oct | 18.2°C · record 24.6°C–30.5°C | 8.1°C · record -6.9°C–2.8°C | 111mm | 10 | 74% | 2.8 m/s | 54% | 2.9 kWh/m² |
| Nov | 11°C · record 17.1°C–26.6°C | 1.2°C · record -13.2°C–-2.5°C | 82mm | 9 | 67% | 3 m/s | 49% | 2.2 kWh/m² |
| Dec | 5.1°C · record 12.6°C–17.1°C | -3°C · record -21°C–-7.4°C | 119mm | 11 | 69% | 3 m/s | 58% | 1.7 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 +0.2°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 +90.61mm per decade over the same period.
2025 (the most recent year on file) averaged 10.9°C, below the 9-year baseline of 11.5°C by 1.74 standard deviations.
Typical extremes per year
Rainy days
128.6 days
≥1.0mm rain
Heavy rain days
15 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
102.2 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
37.7°C
30 June 2021
2021 was 0.42 SD above the 9-year average that year
Coldest day
-25.5°C
15 February 2016
2016 was 0.72 SD above the 9-year average that year
Wettest day
80.3mm
25 December 2020
2020 was 0.97 SD above the 9-year average that year
Windiest day
7.9m/s
2 March 2018
2018 was 0.71 SD below the 9-year average that year
See the detail: New Britain on 25 December 2020.
Nearby cities
Frequently asked questions about New Britain's climate
What is the hottest month in New Britain?
July is typically the warmest month in New Britain, with an average high of 29.2°C. January is typically the coolest, averaging -4.9°C overnight.
How much does it rain in New Britain?
New Britain gets about 1220mm of rain a year on average, with roughly 30% of it falling in the three wettest months (July is typically the wettest, June the driest).
How many extremely hot or cold days does New Britain have?
On average, New Britain sees about 0 day(s) a year at or above 40°C and about 102.2 day(s) at or below 0°C, based on 10 years of data.
Is New Britain getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about +0.21°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 New Britain?
The hottest day on file is 30 June 2021 at 37.7°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
- New Britain — 41.750°, -72.750°, ERA5 grid cell center, 10.2 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 (2026-07-20). Historical climate data for New Britain, United States (41.75°N, 72.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for New Britain, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 20, 2026, from https://www.pastclimate.com/
"Historical Climate Data for New Britain, United States." PastClimate, derived from ERA5 (Copernicus Climate Change Service), July 20, 2026, www.pastclimate.com.
@misc{pastclimate,
author = {PastClimate},
title = {Historical climate data for New Britain, United States},
year = {2026},
note = {Derived from ERA5 (Hersbach et al., 2023), Copernicus Climate Change Service. Accessed 2026-07-20},
url = {https://www.pastclimate.com/}
}Notice something wrong with this data? Report a data issue.