Climate Insights for Andover

The climate in Andover is temperate. The average annual temperature is 15°C and approximately 871mm of precipitation falls per year. May is the wettest month, receiving around 143mm of rainfall. Andover is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are December, January, February, when temperatures can drop to -4°C. Light snow can occur between January and December.

Andover has a wide annual temperature range, spanning 38°C from the coldest to warmest months. The warmest month is July, when average highs reach 34°C and the mean temperature sits around 28°C. The coldest month is December, when overnight lows fall to -4°C and the daily average is 0°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 11°C shift in average temperatures.

Andover is a moderately rainy area, receiving approximately 871mm of precipitation annually, which averages out to around 73mm per month. The wettest month is May, averaging 143mm of rainfall. April and September also tend to see above-average precipitation. The driest month is November, with just 9mm. That's 134mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Light snowfall can occur between January and December, totalling around 15cm annually. March is the snowiest month with approximately 6cm.

Andover is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently summer in Andover, which began on June 21, 2026. Andover is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 34°C, while the coldest stretch bottoms out in December near -4°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Andover is during October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 55mm per month. By contrast, July can be uncomfortably hot with highs reaching 34°C, while December is the coldest period with lows dropping to -4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Andover based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.