Live Weather & Forecast
Weather in Waltham
Massachusetts, United States · Real-time conditions & 3-day outlook
11°C
Feels like 11°C
51°F / Feels 51°F
Sunny
Waltham, Massachusetts
🌞 Daytime
Updated: 2026-04-12 11:30
Humidity
32%
Wind
4.7 km/h NNW
Wind Gust
5.4 km/h
Pressure
1034 mb
Visibility
16 km
UV Index
4.3
(Moderate)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
-4.7°C
Wind Degree
332°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
212.9 μg/m³
NO₂
10.1 μg/m³
O₃
99 μg/m³
SO₂
3.9 μg/m³
PM 2.5
8.5 μg/m³
PM 10
9.9 μg/m³
Today's Hourly Forecast
24-hour breakdown for Waltham, Massachusetts
12 AM
7°
Clear
1 AM
5°
Clear
2 AM
4°
Clear
3 AM
3°
Clear
4 AM
3°
Clear
5 AM
3°
Clear
6 AM
3°
Clear
7 AM
5°
Sunny
8 AM
6°
Sunny
9 AM
8°
Sunny
10 AM
11°
Sunny
11 AM
11°
Sunny
12 PM
15°
Sunny
1 PM
17°
Sunny
2 PM
17°
Sunny
3 PM
15°
Sunny
4 PM
14°
Sunny
5 PM
14°
Sunny
6 PM
13°
Overcast
7 PM
11°
Overcast
8 PM
10°
Overcast
9 PM
9°
Overcast
10 PM
8°
Overcast
11 PM
7°
Overcast
3-Day Forecast
Daily overview for Waltham, Massachusetts
Today
Sunny
18°
/
2°
🌧️ 0% chance of rain
💧 Avg. humidity: 38%
💨 Max wind: 17.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:09 AM
🌇 Sunset: 07:24 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
16°
/
5°
🌧️ 88% chance of rain
💧 Avg. humidity: 82%
💨 Max wind: 23 km/h
🌧️ Total precip: 10.23 mm
☀️ UV Index: 0.4
🌅 Sunrise: 06:07 AM
🌇 Sunset: 07:25 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Partly Cloudy
25°
/
14°
🌧️ 0% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 17.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:05 AM
🌇 Sunset: 07:26 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Waltham
Plan your trip to Waltham, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Waltham?
Current conditions in Waltham: Sunny, temperature 11°C, humidity 32%.
What is the best time to visit Waltham?
The best time to visit Waltham is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Waltham?
Waltham is located at approximately 42.4° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Waltham?
The wettest period in Waltham is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Waltham?
For visits to Waltham during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Waltham in?
Waltham is located in United States, in the state of Massachusetts.
What are the public holidays in Waltham in 2026?
View the 2026 public holidays for Waltham on our Holidays page.
What are the GPS coordinates used for the weather forecast in Waltham?
The weather forecast for Waltham uses coordinates 42.3762, -71.2356.