Few UK towns have warmer summer afternoons than Greenwich
The coldest hours of a January night bottom out at 2.8°C (37°F) on average. Winter and summer sit 21°C apart. Its yearly rainfall falls short of 93% of UK towns. Plan time outside from May to September, when highs sit at 18–24°C.
Met Office 1991–2020 averages for the town itself.
A year in Greenwich at a glance
Each month’s typical high and low, in °C.
What a year in Greenwich feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 600 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. 30th wettest of 33 London boroughs of 2,500+.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Heathrow
26 air frosts and 25 days of 25°C a year
On about 26 nights a year the air drops below freezing, and on about under 1 days it stays below freezing all day. About 25 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 22 miles west of Greenwich, 25 m (82 ft) above sea level. It is the nearest of the 37 long-running stations the Met Office publishes in full.
| 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 Greenwich 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 London boroughs 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 |
|---|---|---|---|
| Greenwich | 23.5°C | 2.8°C | 600 mm |
| Bexley 3.4 mi | 23.3°C about the same | 2.6°C about the same | 600 mm |
| Lewisham 4.0 mi | 23.4°C about the same | 3.0°C about the same | 627 mm |
| Newham 4.1 mi | 23.8°C about the same | 3.0°C about the same | 586 mm |
| Tower Hamlets 5.0 mi | 23.8°C about the same | 3.2°C about the same | 617 mm |
| Bromley 5.8 mi | 22.9°C 0.6°C cooler | 2.3°C 0.6°C colder | 710 mm |
| Barking and Dagenham 5.8 mi | 23.7°C about the same | 2.9°C about the same | 586 mm |
Greenwich 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 | 8.5°C 47°F | 2.8°C 37°F | 5.6°C | 55 mm 2.2 in |
| February | 9.1°C 48°F | 2.6°C 37°F | 5.9°C | 44 mm 1.7 in |
| March | 11.6°C 53°F | 4.2°C 39°F | 7.8°C | 38 mm 1.5 in |
| April | 15.0°C 59°F | 5.8°C 42°F | 10.4°C | 42 mm 1.6 in |
| May | 18.5°C 65°F | 8.6°C 48°F | 13.6°C | 46 mm 1.8 in |
| June | 21.3°C 70°F | 11.5°C 53°F | 16.4°C | 47 mm 1.8 in |
| July | 23.5°C 74°F | 13.7°C 57°F | 18.6°C | 44 mm 1.7 in |
| August | 23.3°C 74°F | 13.7°C 57°F | 18.5°C | 53 mm 2.1 in |
| September | 20.1°C 68°F | 11.1°C 52°F | 15.6°C | 47 mm 1.8 in |
| October | 15.8°C 61°F | 8.5°C 47°F | 12.2°C | 65 mm 2.5 in |
| November | 11.6°C 53°F | 5.5°C 42°F | 8.5°C | 63 mm 2.5 in |
| December | 8.8°C 48°F | 3.2°C 38°F | 6.1°C | 57 mm 2.2 in |
| Year | 15.6°C | 7.6°C | 11.6°C | 600 mm |
Where Greenwich’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the 12 Met Office 2 km grid squares whose centre lies inside Greenwich’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 Heathrow (London Airport), 22 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 Greenwich’s climate
How warm does Greenwich get in summer?
July is the warmest month, with average highs of 23.5°C (74°F). About 25 days a year reach 25°C (77°F), more than almost every UK town.
How cold does Greenwich get in winter?
February nights average 2.6°C (37°F). The air drops below freezing on about 26 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Greenwich get?
About 600 mm (24 in) a year, less than 93% of UK towns. October is the wettest month (65 mm) and March the driest (38 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Heathrow (22 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 Greenwich. 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 Greenwich →
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.