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Hockessin climate
Typical historical weather for Hockessin, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
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Annual average
13.8°C
across all months
Warmest month
30.3°C
Jul average high
Coolest month
-1.8°C
Jan average low
Annual rainfall
1234mm
total per year
Hockessin is typically hottest in July and coolest in January, a swing of about 32.1°C across the year. About 30% 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 | 5.2°C · record 11.4–19.1°C | -1.8°C · record -16.5–-2.5°C | 85mm | 10 | 65% | 3.5 m/s | 58% | 2.2 kWh/m² |
| Feb | 8°C · record 12.9–24.6°C | -0.1°C · record -13.2–-5.9°C | 92mm | 11 | 64% | 3.4 m/s | 62% | 2.9 kWh/m² |
| Mar | 12.3°C · record 18.4–27.7°C | 3.2°C · record -11.1–-2.1°C | 101mm | 11 | 59% | 3.6 m/s | 57% | 4.2 kWh/m² |
| Apr | 17.8°C · record 23.3–31.4°C | 8.3°C · record -2.5–3.1°C | 103mm | 10 | 60% | 3.5 m/s | 63% | 5.1 kWh/m² |
| May | 22.5°C · record 28.8–34.3°C | 13.4°C · record 2.1–9.1°C | 119mm | 13 | 68% | 2.9 m/s | 68% | 5.4 kWh/m² |
| Jun | 27.8°C · record 32.8–37.1°C | 18.4°C · record 10.4–13.1°C | 104mm | 12 | 67% | 2.8 m/s | 59% | 6.3 kWh/m² |
| Jul | 30.3°C · record 33.1–36.5°C | 22°C · record 14.8–20°C | 148mm | 14 | 72% | 2.3 m/s | 59% | 6.1 kWh/m² |
| Aug | 28.8°C · record 31.2–35.1°C | 20.6°C · record 11.8–17°C | 107mm | 12 | 73% | 2.3 m/s | 57% | 5.3 kWh/m² |
| Sep | 25.5°C · record 29.4–35.7°C | 17°C · record 6.7–13.1°C | 107mm | 11 | 73% | 2.6 m/s | 56% | 4.2 kWh/m² |
| Oct | 19.8°C · record 25–34.1°C | 10.8°C · record 1–7.7°C | 87mm | 9 | 72% | 3 m/s | 51% | 3.2 kWh/m² |
| Nov | 12.9°C · record 19.6–26.2°C | 4°C · record -6.6–-1.1°C | 76mm | 8 | 65% | 3.3 m/s | 48% | 2.5 kWh/m² |
| Dec | 7.2°C · record 13.6–18.3°C | 0°C · record -14.3–-2°C | 105mm | 10 | 68% | 3.2 m/s | 61% | 1.8 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 -0.06°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 -133.18mm per decade over the same period.
2025 (the most recent year on file) averaged 13.188677685881336°C, below the 9-year baseline of 13.91°C by 2.58 standard deviations — a genuinely unusual year.
Typical extremes per year
Rainy days
128.9 days
≥1.0mm rain
Heavy rain days
14.3 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
63.3 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
37.1°C
24 June 2025
2025 was 2.58 SD below the 9-year average that year
Coldest day
-16.5°C
7 January 2018
2018 was 1.08 SD below the 9-year average that year
Wettest day
74.1mm
13 April 2020
2020 was 1.27 SD above the 9-year average that year
Windiest day
8.2m/s
23 January 2016
2016 was 0.08 SD below the 9-year average that year
See the detail: Hockessin on 13 April 2020.
Nearby cities
Newark
Same ERA5 grid cell
Bear
Same ERA5 grid cell
Brookside
Same ERA5 grid cell
Landenberg
Same ERA5 grid cell
Pike Creek Valley
Same ERA5 grid cell
North Star
Same ERA5 grid cell
Want a side-by-side view instead? Compare Hockessin with another city.
Frequently asked questions about Hockessin's climate
What is the hottest month in Hockessin?
July is typically the warmest month in Hockessin, with an average high of 30.3°C. January is typically the coolest, averaging -1.8°C overnight.
How much does it rain in Hockessin?
Hockessin gets about 1234mm of rain a year on average, with roughly 30% of it falling in the three wettest months (July is typically the wettest, November the driest).
How many extremely hot or cold days does Hockessin have?
On average, Hockessin sees about 0 day(s) a year at or above 40°C and about 63.3 day(s) at or below 0°C, based on 10 years of data.
Is Hockessin getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about -0.06°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 Hockessin?
The hottest day on file is 24 June 2025 at 37.1°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
- Hockessin — 39.750°, -75.750°, ERA5 grid cell center, 6.2 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 (2026-07-18). Historical climate data for Hockessin, United States (39.75°N, 75.75°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Hockessin, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 18, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Hockessin, 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 Hockessin, 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.