Portsmouth
January
Weather in Portsmouth for January 2026
Your guide to Portsmouth weather in January - trends and predictions
Snowfall in Portsmouth during January is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in Portsmouth at the beginning of January is 9.3 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 8.7 °C by the end of January.
Portsmouth in January brings notable rainfall, with an average of 17 rainy days and a total precipitation of 75.5 mm.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
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13
Dry days
17
Rainy days
1
Snow days
8°/4°
Temperatures
35 km/h
Avg max wind
79 %
Avg humidity
Portsmouth Weather January
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  11° | 2 10° | 3  8° | 4 9° | |||
| 5 10° | 6 10° | 7  7° | 8 5° | 9  5° | 10 7° | 11 7° |
| 12 8° | 13  7° | 14 9° | 15 7° | 16 6° | 17  5° | 18 5° |
| 19 5° | 20 7° | 21 8° | 22 8° | 23 9° | 24 9° | 25 8° |
| 26 9° | 27 8° | 28 8° | 29 9° | 30  9° | 31 10° |
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Temperatures trend during January in Portsmouth
See the weather trend as well as the moving average line
January weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| 1 Jan. | Light rain shower | 11° /6° | 8.9 mm | 0 cm | |
| 2 Jan. | Patchy rain possible | 10° /5° | 3.7 mm | 0 cm | |
| 3 Jan. | Moderate or heavy rain shower | 8° /6° | 4.9 mm | 0 cm | |
| 4 Jan. | Patchy rain possible | 9° /6° | 7.5 mm | 0 cm | |
| 5 Jan. | Patchy rain possible | 10° /6° | 5.7 mm | 0 cm | |
| 6 Jan. | Patchy rain possible | 10° /4° | 2.4 mm | 0 cm | |
| 7 Jan. | Heavy rain at times | 7° /4° | 4.7 mm | 0 cm | |
| 8 Jan. | Heavy rain at times | 5° /3° | 3.7 mm | 0.2 cm | |
| 9 Jan. | Overcast | 5° /2° | 0.2 mm | 0 cm | |
| 10 Jan. | Heavy rain at times | 7° /3° | 5.8 mm | 0 cm | |
| 11 Jan. | Moderate rain at times | 7° /3° | 0.9 mm | 0 cm | |
| 12 Jan. | Overcast | 8° /4° | 3.6 mm | 0 cm | |
| 13 Jan. | Sunny | 7° /4° | 0 mm | 0 cm | |
| 14 Jan. | Moderate or heavy rain shower | 9° /4° | 6.2 mm | 0 cm | |
| 15 Jan. | Overcast | 7° /3° | 0.7 mm | 0 cm | |
| 16 Jan. | Moderate rain at times | 6° /2° | 4.6 mm | 0 cm | |
| 17 Jan. | Cloudy | 5° /2° | 1.3 mm | 0.7 cm | |
| 18 Jan. | Sunny | 5° /1° | 0 mm | 0 cm | |
| 19 Jan. | Sunny | 5° /1° | 0 mm | 0 cm | |
| 20 Jan. | Overcast | 7° /3° | 0.1 mm | 0 cm | |
| 21 Jan. | Cloudy | 8° /3° | 3.8 mm | 0 cm | |
| 22 Jan. | Overcast | 8° /4° | 1.9 mm | 0 cm | |
| 23 Jan. | Sunny | 9° /3° | 2.8 mm | 0 cm | |
| 24 Jan. | Sunny | 9° /5° | 2.8 mm | 0 cm | |
| 25 Jan. | Patchy rain possible | 8° /4° | 2.3 mm | 0 cm | |
| 26 Jan. | Overcast | 9° /4° | 5.2 mm | 0 cm | |
| 27 Jan. | Overcast | 8° /4° | 2.7 mm | 0 cm | |
| 28 Jan. | Cloudy | 8° /5° | 1.7 mm | 0 cm | |
| 29 Jan. | Overcast | 9° /6° | 6 mm | 0 cm | |
| 30 Jan. | Partly cloudy | 9° /4° | 0.1 mm | 0 cm | |
| 31 Jan. | Overcast | 10° /4° | 2.5 mm | 0 cm | |
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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.
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 75.5 mm spread over approximately 17 days. Considering plans for rainy days is advisable.
Will it snow in Portsmouth in January 2026?
Portsmouth typically sees 1.075 cm of snowfall during January.
What are the typical wind conditions in Portsmouth during January?
The average wind speed in Portsmouth during January is 35 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 ❄️
January rainfall patterns in Portsmouth
Explore the daily rainfall trends and prepare for Portsmouths January weather 💧
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