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Manassas Park climate
Typical historical weather for Manassas Park, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.
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Annual average
14.8°C
across all months
Warmest month
32.4°C
Jul average high
Coolest month
-1.6°C
Jan average low
Annual rainfall
1142mm
total per year
Manassas Park is typically hottest in July and coolest in January, a swing of about 34°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 | 6.7°C · record 13.9–24.1°C | -1.6°C · record -15.4–-3.5°C | 87mm | 9 | 65% | 3.1 m/s | 56% | 2.3 kWh/m² |
| Feb | 10.2°C · record 18.1–27.3°C | 0.6°C · record -11.8–-4.4°C | 89mm | 11 | 63% | 3.1 m/s | 61% | 3 kWh/m² |
| Mar | 14.6°C · record 24.6–28.3°C | 3.9°C · record -7–-2.9°C | 78mm | 10 | 57% | 3.3 m/s | 56% | 4.3 kWh/m² |
| Apr | 20.1°C · record 25.2–33.9°C | 9°C · record -2.6–1.9°C | 83mm | 10 | 59% | 3.2 m/s | 59% | 5.2 kWh/m² |
| May | 24°C · record 29.4–36.3°C | 14.1°C · record 2.2–9.1°C | 124mm | 14 | 68% | 2.6 m/s | 67% | 5.4 kWh/m² |
| Jun | 29.5°C · record 33.5–37.3°C | 18.9°C · record 8.3–13.9°C | 101mm | 11 | 64% | 2.5 m/s | 60% | 6.3 kWh/m² |
| Jul | 32.4°C · record 35.2–39.4°C | 22.2°C · record 14.2–20.6°C | 130mm | 13 | 67% | 2 m/s | 58% | 6.1 kWh/m² |
| Aug | 30.4°C · record 33.6–38.1°C | 20.7°C · record 11.1–17.7°C | 104mm | 12 | 71% | 2.1 m/s | 57% | 5.3 kWh/m² |
| Sep | 26.9°C · record 29.2–38.5°C | 17.2°C · record 5.2–14.4°C | 105mm | 10 | 72% | 2.4 m/s | 57% | 4.2 kWh/m² |
| Oct | 21.3°C · record 26.4–35.9°C | 10.7°C · record -0.1–6.4°C | 77mm | 7 | 71% | 2.7 m/s | 49% | 3.4 kWh/m² |
| Nov | 14.3°C · record 22.2–28.1°C | 3.9°C · record -6.1–-2.3°C | 69mm | 8 | 64% | 2.9 m/s | 48% | 2.6 kWh/m² |
| Dec | 8.9°C · record 14.8–20.4°C | 0.3°C · record -13.9–-3.7°C | 95mm | 9 | 67% | 2.8 m/s | 59% | 2 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 -0.02°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 -216.17mm per decade over the same period.
2025 (the most recent year on file) averaged 14.21430308720839°C, below the 9-year baseline of 14.87°C by 1.86 standard deviations.
Typical extremes per year
Rainy days
123.8 days
≥1.0mm rain
Heavy rain days
14.3 days
≥20mm rain
Extreme heat days
0 days
daily high ≥40°C
Frost days
64.2 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
39.4°C
21 July 2019
2019 was 0.53 SD above the 9-year average that year
Coldest day
-15.4°C
31 January 2019
2019 was 0.53 SD above the 9-year average that year
Wettest day
149mm
9 July 2022
2022 was 1.07 SD below the 9-year average that year
Windiest day
10.1m/s
2 March 2018
2018 was 1.91 SD below the 9-year average that year
See the detail: Manassas Park on 9 July 2022.
Nearby cities
Centreville
Same ERA5 grid cell
Manassas
Same ERA5 grid cell
Linton Hall
Same ERA5 grid cell
Buckhall
Same ERA5 grid cell
Sudley
Same ERA5 grid cell
Bull Run
Same ERA5 grid cell
Want a side-by-side view instead? Compare Manassas Park with another city.
Frequently asked questions about Manassas Park's climate
What is the hottest month in Manassas Park?
July is typically the warmest month in Manassas Park, with an average high of 32.4°C. January is typically the coolest, averaging -1.6°C overnight.
How much does it rain in Manassas Park?
Manassas Park gets about 1142mm 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 Manassas Park have?
On average, Manassas Park sees about 0 day(s) a year at or above 40°C and about 64.2 day(s) at or below 0°C, based on 10 years of data.
Is Manassas Park getting warmer?
Across the 10 years on file (2016–2025), the annual average temperature has moved by about -0.02°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 Manassas Park?
The hottest day on file is 21 July 2019 at 39.4°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
- Manassas Park — 38.750°, -77.500°, ERA5 grid cell center, 4.6 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 (2026-07-17). Historical climate data for Manassas Park, United States (38.75°N, 77.50°W), derived from ERA5 (Hersbach et al., 2023, Copernicus Climate Change Service). Retrieved from https://www.pastclimate.com/
PastClimate. (2026). Historical climate data for Manassas Park, United States [Data set]. Derived from ERA5 (Copernicus Climate Change Service). Retrieved July 17, 2026, from https://www.pastclimate.com/
"Historical Climate Data for Manassas Park, 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 Manassas Park, 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.