Climate averages 1991–2020
Belfast weather
in October.
A cool, moderately wet month: the 6th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in Belfast: daytime highs average 12.8°C and nights cool to about 9.0°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 86 mm of rain on roughly 14 days, which makes October a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 34 min on an average October day.
The nearest other city in this atlas is Lisburn (11 km away). In October its highs average 12.5°C, about as warm as Belfast, with 86 mm of rain.
Among the 143 cities listed in the United Kingdom, Belfast ranks joint 121st of 143 for the warmest October highs and joint 108th of 143 for the driest October (rainfall, lowest first). The mean October high of those 143 cities is 13.6°C; Belfast is 0.8°C cooler than that mean.
From October to November, average highs fall by 2.9°C to 9.8°C, and monthly rainfall falls from 86 mm to 85 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Belfast climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.5°C3.9°C | 3.9°C | 77 | 14.2 | 7.98 h |
| February | 7.7°C3.8°C | 3.8°C | 63 | 12.2 | 9.710 h |
| March | 9.1°C4.4°C | 4.4°C | 62 | 13.4 | 11.812 h |
| April | 10.9°C5.9°C | 5.9°C | 65 | 13.0 | 14.014 h |
| May | 13.6°C8.2°C | 8.2°C | 70 | 14.1 | 16.016 h |
| June | 15.9°C10.9°C | 10.9°C | 75 | 13.2 | 17.217 h |
| July | 17.4°C12.5°C | 12.5°C | 81 | 14.6 | 16.717 h |
| August | 17.3°C12.6°C | 12.6°C | 81 | 14.2 | 14.915 h |
| September | 15.7°C11.3°C | 11.3°C | 70 | 12.5 | 12.813 h |
| October, selected | 12.8°C9.0°C | 9.0°C | 86 | 13.5 | 10.611 h |
| November | 9.8°C6.4°C | 6.4°C | 85 | 14.0 | 8.59 h |
| December | 7.9°C4.4°C | 4.4°C | 82 | 13.5 | 7.47 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Lisburn in OctoberUnited Kingdom · 11 kmHigh 12.5°C · Low 8.3°C · 86 mm rain
- Derry in OctoberUnited Kingdom · 99 kmHigh 12.3°C · Low 8.0°C · 88 mm rain
- Douglas in OctoberIsle of Man · 106 kmHigh 13.1°C · Low 11.0°C · 117 mm rain
- Dublin in OctoberIreland · 142 kmHigh 13.3°C · Low 8.6°C · 78 mm rain
- Tallaght in OctoberIreland · 149 kmHigh 12.8°C · Low 8.0°C · 78 mm rain
- Paisley in OctoberUnited Kingdom · 167 kmHigh 11.8°C · Low 6.7°C · 122 mm rain
- East Kilbride in OctoberUnited Kingdom · 171 kmHigh 11.1°C · Low 5.7°C · 110 mm rain
- Glasgow in OctoberUnited Kingdom · 176 kmHigh 11.7°C · Low 6.4°C · 110 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Belfast) is explained once on the Belfast year overview and on the Sources, method and limits page.
Lisburn lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.