Dry weather: only 620 mm (24 in) a year falls on Irchester, less than on 88% of UK towns
The coldest hours of a January night bottom out at 1.6°C (35°F) on average. Wet weather is most frequent in October and least in March. Warm afternoons come more often than in 86% of UK towns. For walks and days out, the stretch from June to September brings highs of 19–23°C.
Met Office 1991–2020 averages for the town itself.
A year in Irchester at a glance
Each month’s typical high and low, in °C.
What a year in Irchester feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 620 mm of rain a year
October is the wettest month and March the driest. About 14 days a year bring 10 mm (0.4 in) or more. 26th wettest of 31 Northamptonshire towns of 2,500+.
Rain by month
Millimetres
42 air frosts and 19 days of 25°C a year
On about 42 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 19 days a year reach 25°C (77°F).
Day counts are 1991–2020 averages from the Met Office’s 2 km grid. The Met Office calls a day of 25°C or more a summer day and a night below 0°C an air frost; ground frosts, on grass, come more often.
The Met Office station at Cambridge NIAB
Cambridge NIAB is 32 miles east of Irchester, 26 m (85 ft) above sea level. It is the nearest of the 37 long-running stations the Met Office publishes in full; at that distance read it for sunshine and the station’s own record, not as the town’s figures.
| Month | High | Low | Rain | Air frosts |
|---|---|---|---|---|
| January | 7.7°C | 1.9°C | 49 mm | 9.0 |
| February | 8.3°C | 1.8°C | 36 mm | 8.7 |
| March | 11.0°C | 3.1°C | 33 mm | 5.2 |
| April | 14.1°C | 4.7°C | 38 mm | 2.6 |
| May | 17.4°C | 7.4°C | 43 mm | 0.6 |
| June | 20.4°C | 10.5°C | 49 mm | 0.0 |
| July | 23.1°C | 12.6°C | 48 mm | 0.0 |
| August | 22.9°C | 12.6°C | 56 mm | 0.0 |
| September | 19.6°C | 10.5°C | 51 mm | 0.0 |
| October | 15.1°C | 7.9°C | 59 mm | 0.7 |
| November | 10.7°C | 4.5°C | 53 mm | 3.7 |
| December | 8.0°C | 2.2°C | 50 mm | 9.2 |
| Year | 14.9°C | 6.6°C | 563 mm | 40 |
Met Office historic station data, Cambridge NIAB, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Irchester compares
Against the 2,537 towns and cities of 2,500 or more across the UK, each with its own Met Office averages, and its place among Northamptonshire towns that size.
Nearby towns’ climate
The nearest towns of 1,000+ within 12 miles: a hill, a valley or the sea can make a real difference over a few miles.
| Town | July high | January low | Rain a year |
|---|---|---|---|
| Irchester | 22.7°C | 1.6°C | 620 mm |
| Wymington 1.9 mi | 22.7°C about the same | 1.6°C about the same | 621 mm |
| Rushden 2.0 mi | 22.9°C about the same | 1.6°C about the same | 620 mm |
| Wollaston 2.1 mi | 22.7°C about the same | 1.5°C about the same | 616 mm |
| Wellingborough 2.9 mi | 22.5°C about the same | 1.6°C about the same | 655 mm |
| Higham Ferrers 3.0 mi | 23.1°C about the same | 1.7°C about the same | 618 mm |
| Great Doddington 3.0 mi | 22.5°C about the same | 1.5°C about the same | 625 mm |
Irchester weather by month
Average daily high and low, mean temperature and rain, 1991–2020, for the town itself (the Met Office’s HadUK-Grid).
| Month | High | Low | Mean | Rain |
|---|---|---|---|---|
| January | 7.4°C 45°F | 1.6°C 35°F | 4.5°C | 54 mm 2.1 in |
| February | 8.1°C 47°F | 1.5°C 35°F | 4.8°C | 42 mm 1.6 in |
| March | 10.9°C 52°F | 2.7°C 37°F | 6.8°C | 37 mm 1.5 in |
| April | 14.1°C 57°F | 4.3°C 40°F | 9.2°C | 43 mm 1.7 in |
| May | 17.3°C 63°F | 7.1°C 45°F | 12.2°C | 51 mm 2.0 in |
| June | 20.3°C 68°F | 10.0°C 50°F | 15.1°C | 51 mm 2.0 in |
| July | 22.7°C 73°F | 12.1°C 54°F | 17.4°C | 51 mm 2.0 in |
| August | 22.4°C 72°F | 12.0°C 54°F | 17.2°C | 62 mm 2.4 in |
| September | 19.3°C 67°F | 9.9°C 50°F | 14.6°C | 52 mm 2.0 in |
| October | 14.8°C 59°F | 7.3°C 45°F | 11.0°C | 63 mm 2.5 in |
| November | 10.4°C 51°F | 4.1°C 39°F | 7.3°C | 59 mm 2.3 in |
| December | 7.6°C 46°F | 1.9°C 35°F | 4.8°C | 56 mm 2.2 in |
| Year | 14.6°C | 6.2°C | 10.4°C | 620 mm |
Where Irchester’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the Met Office 2 km grid square nearest Irchester’s centre (the town is smaller than one square).
- Highs and lows: the Met Office publishes average daily maxima and minima on its 12 km grid; each is moved by the difference between the town’s 2 km mean temperature and the 12 km square’s, which carries the town’s own height and setting over.
- Weather station and sunshine: Met Office historic station data for Cambridge NIAB, 32 miles away, months of 1991–2020 averaged.
- Comparisons: every town and city of 2,500 or more across the UK, all four nations, read the same way.
Met Office HadUK-Grid · Met Office Climate Data Portal · Historic station data. Open Government Licence v3.0.
Questions about Irchester’s climate
How warm does Irchester get in summer?
July is the warmest month, with average highs of 22.7°C (73°F). About 19 days a year reach 25°C (77°F), more than 86% of UK towns.
How cold does Irchester get in winter?
February nights average 1.5°C (35°F). The air drops below freezing on about 42 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Irchester get?
About 620 mm (24 in) a year, less than 88% of UK towns. October is the wettest month (63 mm) and March the driest (37 mm).
Where do these figures come from?
The Met Office’s HadUK-Grid 1991–2020 averages, which turn thousands of weather stations into a map of the UK in 2 km squares; the page reads the squares inside Irchester. They are 30-year averages, not a forecast.
Contains Met Office data © Crown copyright 2026, Open Government Licence v3.0. HadUK-Grid 1991–2020 averages via the Met Office Climate Data Portal; station averages from Met Office historic station data. Today’s forecast for Irchester →
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