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Weather in Portsmouth for January 2026

Your guide to Portsmouth weather in January - trends and predictions

    Official Weather Alert ⚠️

  • Yellow Rain Warning - See hour by hour.

    • Snow Forecast ❄️

  • With an average of 2 snowy days, Portsmouth usually enjoys a light touch of snow in January.
    According to Portsmouth snow forecast for January 2026, no snow is expected until the end of the month.

    • Temperatures

  • Until now, January 2026 in Portsmouth has been nearly identical to the historical average, with a temperature of 7.2 °C (showing only a slight deviation of -0.5 °C).

  • The forecast for the next days in Portsmouth predicts temperatures to be around 9 °C, close to the historical average.

  • In general, the average temperature in Portsmouth at the beginning of January is 8.1 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 8.4 °C by the end of January.

    • Rain 🌧️

  • Portsmouth experiences heavy rainfall in January, with over 20 rainy days and an average total precipitation 96.6 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
8
Dry days
Average rainy days
21
Rainy days
Average snowy days
2
Snow days
Average temperatures
8°/4°
Temperatures
Average wind speed
34 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Portsmouth Weather January

Move between months or click on a day
December
February
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
10°
2
Patchy rain possible
8°
3
Sunny
7°
4
Patchy rain possible
8°
5
Patchy rain possible
8°
6
Patchy rain possible
9°
7
Heavy rain at times
7°
8
Heavy rain at times
7°
9
Overcast
6°
10
Heavy rain at times
6°
11
Moderate rain at times
8°
12
Overcast
9°
13
Sunny
8°
14
Moderate or heavy rain shower
8°
15
Overcast
7°
16
Moderate rain at times
7°
17
Cloudy
6°
18
Sunny
5°
19
Sunny
6°
20
Overcast
7°
21
Cloudy
9°
22
Light rain shower
9°
23
Sunny
8°
24
Patchy rain possible
9°
25
Patchy rain possible
8°
26
Overcast
9°
27
Light rain shower
8°
28
Cloudy
8°
29
Weather Alert Patchy rain possible
8°
30
Weather Alert Moderate rain
9°
31
Patchy rain possible
9°

Temperatures trend during January in Portsmouth

See the weather trend as well as the moving average line

January weather in Portsmouth day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
1 Jan. Patchy rain possible
Patchy rain possible
 10° /5° 6.7 mm 0 cm
2 Jan. Patchy rain possible
Patchy rain possible
 8° /4° 2.8 mm 0 cm
3 Jan. Sunny
Sunny
 7° /4° 3.7 mm 0 cm
4 Jan. Patchy rain possible
Patchy rain possible
 8° /5° 5.7 mm 0 cm
5 Jan. Patchy rain possible
Patchy rain possible
 8° /4° 4.3 mm 0 cm
6 Jan. Patchy rain possible
Patchy rain possible
 9° /3° 2.1 mm 0 cm
7 Jan. Heavy rain at times
Heavy rain at times
 7° /4° 5.4 mm 0 cm
8 Jan. Heavy rain at times
Heavy rain at times
 7° /3° 7 mm 0.2 cm
9 Jan. Overcast
Overcast
 6° /2° 0.8 mm 0.1 cm
10 Jan. Heavy rain at times
Heavy rain at times
 6° /3° 4.4 mm 0 cm
11 Jan. Moderate rain at times
Moderate rain at times
 8° /3° 1.9 mm 0 cm
12 Jan. Overcast
Overcast
 9° /5° 2.9 mm 0 cm
13 Jan. Sunny
Sunny
 8° /5° 3.3 mm 0 cm
14 Jan. Moderate or heavy rain shower
Moderate or heavy rain shower
 8° /4° 5 mm 0 cm
15 Jan. Overcast
Overcast
 7° /4° 5.7 mm 0 cm
16 Jan. Moderate rain at times
Moderate rain at times
 7° /3° 4.1 mm 0 cm
17 Jan. Cloudy
Cloudy
 6° /3° 1.3 mm 0.5 cm
18 Jan. Sunny
Sunny
 5° /1° 0 mm 0 cm
19 Jan. Sunny
Sunny
 6° /2° 0.3 mm 0 cm
20 Jan. Overcast
Overcast
 7° /4° 0.1 mm 0 cm
21 Jan. Cloudy
Cloudy
 9° /4° 2.9 mm 0 cm
22 Jan. Light rain shower
Light rain shower
 9° /4° 2.3 mm 0 cm
23 Jan. Sunny
Sunny
 8° /4° 3 mm 0 cm
24 Jan. Patchy rain possible
Patchy rain possible
 9° /6° 2.2 mm 0 cm
25 Jan. Patchy rain possible
Patchy rain possible
 8° /4° 3.5 mm 0 cm
26 Jan. Overcast
Overcast
 9° /4° 5.6 mm 0 cm
27 Jan. Light rain shower
Light rain shower
 8° /5° 5.3 mm 0 cm
28 Jan. Cloudy
Cloudy
 8° /5° 1.7 mm 0 cm
29 Jan. Patchy rain possible
Patchy rain possible
 8° /6° 4.7 mm 0 cm
30 Jan. Moderate rain
Moderate rain
 9° /7° 10.7 mm 0 cm
31 Jan. Patchy rain possible
Patchy rain possible
 9° /7° 3.4 mm 0 cm
Next
Important Notice
Our weather forecast for Portsmouth in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Portsmouth forecast closer to your planned date for the most up-to-date weather information.
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Portsmouth in January - FAQ

What are the expected maximum and minimum temperatures in Portsmouth during January?

Prepare for cooler days with highs just around 8° and colder nights, dipping below 4°.

How much rainfall should be expected in Portsmouth during January?

Moderate rainfall is anticipated in Portsmouth during January, with a total of 96.6 mm spread over approximately 21 days. Considering plans for rainy days is advisable.

Will it snow in Portsmouth in January 2026?

Portsmouth experiences an average snowfall of 0.936667 cm during January, occurring over 2 days.

What are the typical wind conditions in Portsmouth during January?

The average wind speed in Portsmouth during January is 34 km/h, suggesting breezy to windy conditions, depending on your activities.

Portsmouth snow forecast January 2026

Track daily snowfall levels and discover Portsmouth’s snowy potential this January ❄️
On average, Portsmouth sees 2 snowy days during January, with approximately 0.9 cm of total snowfall.

January rainfall patterns in Portsmouth

Explore the daily rainfall trends and prepare for Portsmouths January weather 💧
Typically, Portsmouth has 21 rainy days in January with a total of 96.6 mm of rainfall.

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Get accurate weather forecasts for Portsmouth, located at latitude 50.799 and longitude -1.091. Stay updated with localized weather information tailored for Portsmouth.

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