Jordanstown climate — normals and trends
Jordanstown (United Kingdom) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.4 °C and it receives 902 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (14.5 °C on average) and the coldest is January (4.9 °C). Rainfall peaks in October.
Jordanstown averages 12 frost days, 0 hot days (≥ 30 °C) and 172 rainy days per year.
Jordanstown has warmed by +1.0 °C between 1940 and 2025, or +0.12 °C per decade. This trend is statistically significant.
The number of frost days there went from about 19 to 5 per year over the period.
The hottest day of the period reached 25.0 °C (on 18 July 2022) and the coldest -10.2 °C (on 1 March 1947).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
JordanstownNorthern Ireland
- coords
- 54.68°, -5.90°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.4°C
Average daily high
11.7°C
Average daily low
7.1°C
Annual rainfall
902mm
Sunshine / day
7.6h
Mean relative humidity
83%
Average peak wind
22.8km/h
Seasonal range
9.6°C
Frost days (< 0 °C)
12 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
172 d/yr
Annual snowfall
16.6 cm
Average feels-like high
8.8 °C
Average feels-like low
3.8 °C
Average peak gust
44.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.29 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
25.0 °C
18 July 2022
Coldest day
-10.2 °C
1 March 1947
Wettest day
45 mm
2 October 1981
Windiest day
63.0 km/h
8 January 2005
Strongest gust
123.5 km/h
13 January 1984
Hottest feels-like
27.0 °C
17 July 2021
Coldest feels-like
-15.1 °C
1 March 1947
Snowiest day
24.3 cm
22 March 2013
Sunniest day
16.9 h
1 July 2025
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 7.0 °C | +0.2 °C | 47 mm | -33 mm |
| Feb | 8.1 °C | +1.1 °C | 49 mm | -15 mm |
| Mar | 10.5 °C | +2.0 °C | 21 mm | -45 mm |
| Apr | 13.2 °C | +2.7 °C | 71 mm | +7 mm |
| May | 15.6 °C | +2.4 °C | 58 mm | -13 mm |
| Jun | 16.8 °C | +1.1 °C | 116 mm | +45 mm |
| Jul | 18.3 °C | +1.3 °C | 92 mm | +12 mm |
| Aug | 18.7 °C | +1.7 °C | 52 mm | -32 mm |
| Sep | 15.5 °C | +0.2 °C | 123 mm | +45 mm |
| Oct | 12.8 °C | +0.2 °C | 116 mm | +30 mm |
| Nov | 10.1 °C | +0.8 °C | 126 mm | +47 mm |
| Dec | 8.7 °C | +1.1 °C | 96 mm | +14 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Jordanstown?
Jordanstown has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.4 °C and it receives 902 mm of precipitation per year.
What is the hottest day ever recorded in Jordanstown?
The hottest day measured in Jordanstown between 1940 and 2025 was 18 July 2022, reaching 25.0 °C.
What is the coldest day in Jordanstown?
The coldest day measured in Jordanstown between 1940 and 2025 was 1 March 1947, at -10.2 °C.
Does it snow in Jordanstown?
Yes. Jordanstown gets on average 16.6 cm of snow per year and has around 12 frost days.
Has the climate of Jordanstown warmed?
Yes: Jordanstown warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jordanstown?
The wettest day measured in Jordanstown between 1940 and 2025 was 2 October 1981, with 45 mm of rain in 24 hours.
What was the windiest day in Jordanstown?
The windiest day measured in Jordanstown between 1940 and 2025 was 8 January 2005, with winds reaching 63.0 km/h.
What is the warmest month in Jordanstown?
The warmest month in Jordanstown is July (14.5 °C on average); the coldest is January (4.9 °C).
How much does it rain in Jordanstown?
Jordanstown receives on average 902 mm of precipitation per year, spread over about 172 rainy days.
Is it sunny in Jordanstown?
Jordanstown gets on average 7.6 hours of sunshine per day, roughly 2,774 hours per year over 1940-2025.
What is the biggest single-day snowfall in Jordanstown?
The heaviest 24-hour snowfall measured in Jordanstown between 1940 and 2025 was 22 March 2013, with 24.3 cm.
Are there tropical nights in Jordanstown?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Jordanstown.
What was the most extreme apparent temperature in Jordanstown?
In Jordanstown, between 1940 and 2025, the highest apparent temperature reached 27.0 °C on 17 July 2021, and the lowest was -15.1 °C on 1 March 1947.
Compare Jordanstown with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jordanstown