More days reach 25 degrees in Newnham than in 79% of UK towns
In January the night’s low is typically 1.8°C (35°F). About 45 nights a year bring a frost, more than in 68% of UK towns. Winter and summer sit 21°C apart. Gritters and ice scrapers earn their keep on roughly 45 nights a year below 0°C.
Met Office 1991–2020 averages for the town itself.
A year in Newnham at a glance
Each month’s typical high and low, in °C.
What a year in Newnham feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 719 mm of rain a year
January is the wettest month and May the driest. About 20 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Heathrow
45 air frosts and 17 days of 25°C a year
On about 45 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 17 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 Heathrow
Heathrow is 27 miles north-east of Newnham, 25 m (82 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 | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.4°C | 2.7°C | 59 mm | 6.8 | 59 |
| February | 9.0°C | 2.6°C | 45 mm | 6.2 | 76 |
| March | 11.7°C | 4.1°C | 39 mm | 3.0 | 120 |
| April | 15.0°C | 6.0°C | 42 mm | 0.8 | 169 |
| May | 18.4°C | 9.1°C | 46 mm | 0.0 | 197 |
| June | 21.6°C | 12.0°C | 47 mm | 0.0 | 197 |
| July | 23.9°C | 14.2°C | 46 mm | 0.0 | 206 |
| August | 23.4°C | 14.1°C | 54 mm | 0.0 | 192 |
| September | 20.2°C | 11.6°C | 50 mm | 0.0 | 150 |
| October | 15.8°C | 8.8°C | 65 mm | 0.3 | 111 |
| November | 11.5°C | 5.3°C | 67 mm | 2.7 | 68 |
| December | 8.8°C | 3.1°C | 57 mm | 7.2 | 53 |
| Year | 15.6°C | 7.8°C | 616 mm | 27 | 1,597 |
Met Office historic station data, Heathrow (London Airport), 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Newnham 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 Hampshire 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 |
|---|---|---|---|
| Newnham | 22.3°C | 1.8°C | 719 mm |
| Hook 1.3 mi | 22.3°C about the same | 1.9°C about the same | 717 mm |
| Odiham 2.4 mi | 22.6°C about the same | 1.9°C about the same | 760 mm |
| Old Basing 2.4 mi | 22.7°C about the same | 1.9°C about the same | 736 mm |
| Sherfield on Loddon 3.4 mi | 22.6°C about the same | 1.8°C about the same | 740 mm |
| Hartley Wintney 3.8 mi | 22.9°C 0.6°C warmer | 1.6°C about the same | 731 mm |
| Bramley 4.6 mi | 22.6°C about the same | 1.7°C about the same | 741 mm |
Newnham 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 | 7.7°C 46°F | 1.8°C 35°F | 4.8°C | 80 mm 3.2 in |
| February | 8.3°C 47°F | 1.8°C 35°F | 5.0°C | 53 mm 2.1 in |
| March | 10.9°C 52°F | 3.1°C 38°F | 7.0°C | 47 mm 1.8 in |
| April | 13.9°C 57°F | 4.6°C 40°F | 9.3°C | 52 mm 2.0 in |
| May | 17.2°C 63°F | 7.5°C 45°F | 12.3°C | 46 mm 1.8 in |
| June | 20.0°C 68°F | 10.3°C 51°F | 15.2°C | 49 mm 1.9 in |
| July | 22.3°C 72°F | 12.5°C 54°F | 17.4°C | 53 mm 2.1 in |
| August | 21.9°C 71°F | 12.3°C 54°F | 17.1°C | 53 mm 2.1 in |
| September | 19.0°C 66°F | 10.1°C 50°F | 14.5°C | 55 mm 2.2 in |
| October | 14.9°C 59°F | 7.5°C 46°F | 11.2°C | 78 mm 3.1 in |
| November | 10.8°C 51°F | 4.5°C 40°F | 7.6°C | 80 mm 3.1 in |
| December | 8.1°C 46°F | 2.2°C 36°F | 5.1°C | 73 mm 2.9 in |
| Year | 14.6°C | 6.5°C | 10.5°C | 719 mm |
Where Newnham’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 Newnham’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 Heathrow (London Airport), 27 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 Newnham’s climate
How warm does Newnham get in summer?
July is the warmest month, with average highs of 22.3°C (72°F). About 17 days a year reach 25°C (77°F), more than 79% of UK towns.
How cold does Newnham get in winter?
February nights average 1.8°C (35°F). The air drops below freezing on about 45 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Newnham get?
About 719 mm (28 in) a year, less than 61% of UK towns. January is the wettest month (80 mm) and May the driest (46 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Heathrow (27 miles away), averages 1,597 hours of bright sunshine a year. Sunshine isn’t on the town grid, so this is the station’s figure.
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 Newnham. 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 Newnham →
Contains public sector information licensed under the Open Government Licence v3.0. Contains HM Land Registry data © Crown copyright and database right 2026. Contains OS data © Crown copyright and database right 2026 (ONS boundaries). Northern Ireland: Source: NISRA; contains Land & Property Services data and Ordnance Survey of Northern Ireland information, © Crown copyright, licensed under the Open Government Licence v3.0. Scotland: contains National Records of Scotland data, Registers of Scotland data and SEPA data, © Crown copyright / © SEPA 2025, licensed under the Open Government Licence v3.0.