Climate averages 1991–2020

Plymouth weather
in January.

A cool, wet month: one of the coolest and the 9th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 8.7°C Daytime mean, January

Average low 4.9°C Night-time mean, January

Rainfall 102 mm 16 days with ≥1 mm

Daylight 9 h Sunrise to sunset, per day

January is a cool month in Plymouth: daytime highs average 8.7°C and nights cool to about 4.9°C. By daytime temperature it is one of the coolest months of the year.

Expect about 102 mm of rain on roughly 16 days, which makes January a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 33 min on an average January day.

The nearest other city in this atlas is Exeter (59 km away). In January its highs average 8.0°C, 0.7°C cooler than Plymouth, with 67 mm of rain.

Among the 143 cities listed in the United Kingdom, Plymouth ranks 1st of 143 for the warmest January highs and joint 133rd of 143 for the driest January (rainfall, lowest first). The mean January high of those 143 cities is 6.9°C; Plymouth is 1.8°C warmer than that mean.

From January to February, average highs stay level at 8.7°C, and monthly rainfall falls from 102 mm to 77 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Plymouth climate table

1991–2020

Monthly climate averages for Plymouth, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	8.7°C4.9°C	4.9°C	102	15.5	8.69 h
February	8.7°C4.4°C	4.4°C	77	12.0	10.010 h
March	10.2°C5.2°C	5.2°C	67	11.9	11.812 h
April	12.3°C6.5°C	6.5°C	63	11.5	13.814 h
May	15.0°C9.2°C	9.2°C	61	10.7	15.415 h
June	17.6°C11.9°C	11.9°C	61	10.6	16.316 h
July	19.4°C13.9°C	13.9°C	61	10.5	16.016 h
August	19.4°C14.1°C	14.1°C	69	11.2	14.515 h
September	17.4°C12.5°C	12.5°C	61	10.3	12.713 h
October	14.4°C10.3°C	10.3°C	104	14.5	10.811 h
November	11.3°C7.6°C	7.6°C	112	15.4	9.19 h
December	9.3°C5.6°C	5.6°C	109	15.1	8.18 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

January in nearby cities

Distance from Plymouth

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 limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Plymouth) is explained once on the Plymouth year overview and on the Sources, method and limits page.