Waltham Weather in September

September in Waltham typically sees daytime highs of 20°C (68°F) and nighttime lows of 13°C (55°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the summer season.

Rainfall in Waltham in September

Climate statistics over the past 30 years suggest around 12 days of rain, with 60 mm (2.4 in) average for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Waltham in September

September is one of the better months to visit Waltham. Expect 20°C (68°F) during the day and 13°C (55°F) at night. The month of September belongs to the summer season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Waltham in September

The month brings about 152 hours of sunlight, offering a comfortable mix of sun and overcast.

If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Waltham.