Less rain falls on Olney than on 87% of UK towns: 625 mm (25 in) a year
The depth of winter brings overnight lows near 1.6°C (35°F). Seasons differ by 21°C, from the coldest nights to the warmest afternoons. Warm days come often: about 18 a year reach 25°C, more than in 83% 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 Olney at a glance
Each month’s typical high and low, in °C.
What a year in Olney feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 625 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. 38th wettest of 39 Buckinghamshire towns of 2,500+.
Rain by month
Millimetres
47 air frosts and 18 days of 25°C a year
On about 47 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 18 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 35 miles east of Olney, 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 Olney 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 Buckinghamshire 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 |
|---|---|---|---|
| Olney | 22.5°C | 1.6°C | 625 mm |
| Lavendon 2.1 mi | 22.5°C about the same | 1.5°C about the same | 641 mm |
| Bozeat 4.7 mi | 22.3°C about the same | 1.4°C about the same | 647 mm |
| Newport Pagnell 5.1 mi | 22.7°C about the same | 1.8°C about the same | 644 mm |
| Harrold 5.2 mi | 22.4°C about the same | 1.7°C about the same | 637 mm |
| Hanslope 6.0 mi | 22.6°C about the same | 1.4°C about the same | 680 mm |
| Hartwell 6.1 mi | 22.1°C about the same | 1.2°C about the same | 705 mm |
Olney 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 | 7.5°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 | 43 mm 1.7 in |
| March | 10.8°C 51°F | 2.8°C 37°F | 6.8°C | 38 mm 1.5 in |
| April | 13.9°C 57°F | 4.3°C 40°F | 9.1°C | 45 mm 1.8 in |
| May | 17.0°C 63°F | 7.0°C 45°F | 12.0°C | 53 mm 2.1 in |
| June | 20.0°C 68°F | 9.9°C 50°F | 15.0°C | 50 mm 2.0 in |
| July | 22.5°C 73°F | 12.0°C 54°F | 17.3°C | 50 mm 2.0 in |
| August | 22.2°C 72°F | 12.0°C 54°F | 17.1°C | 54 mm 2.1 in |
| September | 19.1°C 66°F | 9.9°C 50°F | 14.5°C | 53 mm 2.1 in |
| October | 14.8°C 59°F | 7.3°C 45°F | 11.0°C | 66 mm 2.6 in |
| November | 10.4°C 51°F | 4.1°C 39°F | 7.3°C | 62 mm 2.4 in |
| December | 7.8°C 46°F | 1.9°C 35°F | 4.8°C | 58 mm 2.3 in |
| Year | 14.5°C | 6.2°C | 10.4°C | 625 mm |
Where Olney’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the 1 Met Office 2 km grid square whose centre lies inside Olney’s built-up area.
- 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, 35 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 Olney’s climate
How warm does Olney get in summer?
July is the warmest month, with average highs of 22.5°C (73°F). About 18 days a year reach 25°C (77°F), more than 83% of UK towns.
How cold does Olney get in winter?
February nights average 1.5°C (35°F). The air drops below freezing on about 47 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Olney get?
About 625 mm (25 in) a year, less than 87% of UK towns. October is the wettest month (66 mm) and March the driest (38 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 Olney. 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 Olney →
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