Climate Insights for Waltham

The climate in Waltham is cool. The average annual temperature is 6°C and approximately 1,086 mm of precipitation falls per year. Waltham receives a notable amount of rainfall throughout the year, including during its driest month. Waltham is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to -13°C. Waltham experiences heavy snowfall, typically from January through December.The climate in Waltham is cool. The average annual temperature is 42°F and approximately 42.8 in of precipitation falls per year. Waltham receives a notable amount of rainfall throughout the year, including during its driest month. Waltham is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, February, December, when temperatures can drop to 8°F. Waltham experiences heavy snowfall, typically from January through December.

Waltham has a wide annual temperature range, spanning 38°C from the coldest to warmest months. The warmest month is July, when average highs reach 25°C and the mean temperature sits around 20°C. The coldest month is January, when overnight lows fall to -13°C and the daily average is -9°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 8°C shift in average temperatures.Waltham has a wide annual temperature range, spanning 70°F from the coldest to warmest months. The warmest month is July, when average highs reach 78°F and the mean temperature sits around 69°F. The coldest month is January, when overnight lows fall to 8°F and the daily average is 15°F. On average, daily temperatures fluctuate by about 16°F between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 15°F shift in average temperatures.

Waltham is a moderately rainy area, receiving approximately 1,086 mm of precipitation annually, which averages out to around 91 mm per month. The wettest month is June, averaging 114 mm of rainfall. August and April also tend to see above-average precipitation. The driest month is January, with just 68 mm. That's 46 mm less than June, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Waltham receives heavy snowfall, accumulating around 248cm annually from January through December. The snowiest month is January, with approximately 58cm. Winter travel should account for significant snow cover.Waltham is a moderately rainy area, receiving approximately 42.8 in of precipitation annually, which averages out to around 3.6 in per month. The wettest month is June, averaging 4.5 in of rainfall. August and April also tend to see above-average precipitation. The driest month is January, with just 2.7 in. That's 1.8 in less than June, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Waltham receives heavy snowfall, accumulating around 98in annually from January through December. The snowiest month is January, with approximately 23in. Winter travel should account for significant snow cover.

Waltham is relatively calm, with an average annual wind speed of 11km/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 12km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.Waltham is mildly breezy, with an average annual wind speed of 7mph. For context, sustained winds below 7mph are generally light, while anything above 16mph is considered strong. The windiest month is March, averaging 7mph, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 6mph, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1mph between the calmest and windiest months.

The best time to visit Waltham is during July, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 96 mm per month. By contrast, January can be quite cold with temperatures dropping to -13°C. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.The best time to visit Waltham is during July, when the weather is most comfortable for travellers. During these months, average temperatures hover around 69°F with modest rainfall averaging 3.8 in per month. By contrast, January can be quite cold with temperatures dropping to 8°F. Despite being the best months overall, some rain is still likely. Pack a waterproof layer and plan a mix of indoor and outdoor activities.

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