Photo: Richard Dorrell · CC BY-SA 2.0Warm afternoons come to Annan less often than to 86% of UK towns
In January the night’s low is typically 1.6°C (35°F). Rain is plentiful here, more than falls on 80% of UK towns. October is the wettest month, April the driest. Keep the boiler serviced for the months from November to April, which average under 10°C.
Met Office 1991–2020 averages for the town itself.
A year in Annan at a glance
Each month’s typical high and low, in °C.
What a year in Annan feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 1,036 mm of rain a year
October is the wettest month and April the driest. About 26 days a year bring 10 mm (0.4 in) or more. 9th wettest of 10 Dumfries and Galloway towns of 2,500+.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Eskdalemuir
44 air frosts and 3 days of 25°C a year
On about 44 nights a year the air drops below freezing, and on about under 1 days it stays below freezing all day. About 3 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 Eskdalemuir
Eskdalemuir is 22 miles north of Annan, 242 m (794 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 | 5.2°C | −0.1°C | 208 mm | 14.4 | 37 |
| February | 5.9°C | −0.2°C | 170 mm | 13.7 | 59 |
| March | 7.8°C | 0.8°C | 147 mm | 11.9 | 84 |
| April | 10.8°C | 2.4°C | 102 mm | 7.5 | 129 |
| May | 14.1°C | 4.8°C | 103 mm | 3.8 | 162 |
| June | 16.4°C | 7.9°C | 111 mm | 0.2 | 132 |
| July | 18.2°C | 9.6°C | 130 mm | 0.0 | 131 |
| August | 17.7°C | 9.5°C | 145 mm | 0.1 | 123 |
| September | 15.3°C | 7.4°C | 132 mm | 0.7 | 97 |
| October | 11.7°C | 4.8°C | 185 mm | 4.3 | 69 |
| November | 8.0°C | 2.0°C | 190 mm | 9.3 | 48 |
| December | 5.5°C | −0.2°C | 206 mm | 13.8 | 37 |
| Year | 11.4°C | 4.1°C | 1,829 mm | 80 | 1,107 |
Met Office historic station data, Eskdalemuir, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Kipp & Zonen recorder.
How Annan 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 Dumfries and Galloway 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 |
|---|---|---|---|
| Annan | 19.6°C | 1.6°C | 1,036 mm |
| Gretna 7.6 mi | 20.2°C 0.5°C warmer | 1.4°C about the same | 876 mm |
| Silloth 9.8 mi | 19.3°C about the same | 2.3°C 0.7°C milder | 948 mm |
| Lockerbie 10.1 mi | 19.6°C about the same | 1.2°C about the same | 1,139 mm |
| Longtown 11.6 mi | 20.3°C 0.6°C warmer | 1.5°C about the same | 949 mm |
| Wigton 12.0 mi | 19.5°C about the same | 1.4°C about the same | 1,019 mm |
Annan 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 | 7.0°C 45°F | 1.6°C 35°F | 4.3°C | 93 mm 3.7 in |
| February | 7.8°C 46°F | 1.7°C 35°F | 4.7°C | 76 mm 3.0 in |
| March | 9.7°C 49°F | 2.6°C 37°F | 6.1°C | 71 mm 2.8 in |
| April | 12.4°C 54°F | 4.2°C 40°F | 8.3°C | 55 mm 2.2 in |
| May | 15.5°C 60°F | 6.7°C 44°F | 11.1°C | 61 mm 2.4 in |
| June | 17.9°C 64°F | 9.5°C 49°F | 13.7°C | 79 mm 3.1 in |
| July | 19.6°C 67°F | 11.4°C 52°F | 15.4°C | 95 mm 3.7 in |
| August | 19.3°C 67°F | 11.2°C 52°F | 15.2°C | 101 mm 4.0 in |
| September | 17.1°C 63°F | 9.4°C 49°F | 13.2°C | 84 mm 3.3 in |
| October | 13.6°C 56°F | 6.6°C 44°F | 10.1°C | 114 mm 4.5 in |
| November | 9.9°C 50°F | 3.8°C 39°F | 6.9°C | 100 mm 3.9 in |
| December | 7.4°C 45°F | 1.6°C 35°F | 4.5°C | 107 mm 4.2 in |
| Year | 13.1°C | 5.8°C | 9.4°C | 1,036 mm |
Where Annan’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 Annan’s locality.
- 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 Eskdalemuir, 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 Annan’s climate
How warm does Annan get in summer?
July is the warmest month, with average highs of 19.6°C (67°F). About 3 days a year reach 25°C (77°F), fewer than 86% of UK towns.
How cold does Annan get in winter?
January nights average 1.6°C (35°F). The air drops below freezing on about 44 nights a year, and about under 1 days a year stay below freezing all day.
How much rain does Annan get?
About 1,036 mm (41 in) a year, more than 80% of UK towns. October is the wettest month (114 mm) and April the driest (55 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Eskdalemuir (22 miles away), averages 1,107 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 Annan. 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 Annan →
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.