Outdoor conditions in

Waltham

Massachusetts
Now
  1. 53°Sunny0% rain69% humidityGusts 18 mph
  2. 55°Sunny0% rain61% humidityGusts 16 mph
  3. 58°Sunny0% rain55% humidityGusts 14 mph
  4. 59°Sunny0% rain53% humidityGusts 12 mph
  5. 61°Sunny0% rain48% humidityGusts 9 mph
  6. 61°Sunny0% rain46% humidityGusts 7 mph
  7. 60°Sunny0% rain47% humidityGusts 6 mph
  8. 59°Sunny0% rain51% humidityGusts 5 mph
  9. 56°Mostly Clear0% rain59% humidityGusts 3 mph
  10. 53°Mostly Clear0% rain66% humidityGusts 5 mph
  11. 49°Partly Cloudy0% rain77% humidityGusts 5 mph
  12. 47°Mostly Clear0% rain83% humidityGusts 5 mph
  13. 46°Mostly Clear0% rain83% humidityGusts 5 mph
  14. 46°Mostly Clear0% rain86% humidityGusts 5 mph
  15. 45°Partly Cloudy0% rain89% humidityGusts 6 mph
  16. 45°Mostly Clear0% rain89% humidityGusts 6 mph
  17. 45°Partly Cloudy1% rain89% humidityGusts 7 mph
  18. 46°Mostly Cloudy3% rain86% humidityGusts 7 mph
  19. 46°Mostly Cloudy6% rain86% humidityGusts 9 mph
  20. 47°Mostly Cloudy8% rain83% humidityGusts 10 mph
  21. 47°Slight Chance Rain Showers23% rain86% humidityGusts 13 mph
  22. 48°Chance Rain Showers37% rain86% humidityGusts 16 mph
  23. 49°Chance Rain Showers51% rain89% humidityGusts 20 mph
  24. 50°Rain Showers Likely59% rain100% humidityGusts 23 mph
Extra care for

A little farther out

The next five days

Today

Today looks fairly quiet.

Rain
0%
Humidity
46–86%
Wind
22 mph
Fri

Friday looks wet for a meaningful stretch.

Rain
76%
Humidity
83–100%
Wind
30 mph
Sat

Saturday has a real shower chance.

Rain
65%
Humidity
44–93%
Wind
31 mph
Sun

Sunday looks fairly quiet.

Rain
3%
Humidity
46–79%
Wind
15 mph
Mon

Monday looks fairly quiet.

Rain
15%
Humidity
53–92%
Wind
20 mph
  1. 61° / 46°Today looks fairly quiet.0% rain · Humidity 46–86% · Wind 22 mph
  2. 68° / 45°Friday looks wet for a meaningful stretch.76% rain · Humidity 83–100% · Wind 30 mph
  3. 61° / 38°Saturday has a real shower chance.65% rain · Humidity 44–93% · Wind 31 mph
  4. 53° / 33°Sunday looks fairly quiet.3% rain · Humidity 46–79% · Wind 15 mph
  5. 60° / 39°Monday looks fairly quiet.15% rain · Humidity 53–92% · Wind 20 mph

Environmental watch

Air quality + smoke

Air quality

Boston Metro area · Updated Thu 10:25 AM
18GoodUS AQI

Good through Sat 12 PM.

Sky check

No plume detected overhead

Satellite view · Updated Thu 8:45 AM

Air near ground18 · Good US AQI

Rain, in motion · Past four hours

Waltham radar

Ready when you areSee what is moving toward Waltham.

Watch the last four hours of rain, then search any nearby trail, lake, or address.

View the official forecast ↗

Outdoor fire check

Thinking about a backyard fire?

Weather is less concerning around 5 PM–8 PM.

Humidity stays higher and winds stay lighter for at least three hours.

Next 12 hoursChoose a time to see what is driving the concern.
Selected timeNowUse caution

Sustained wind is 10 mph. Gusts may reach 18 mph.

Humidity
69%
Wind
10 mph
Gusts
18 mph

Check local rules. Weather is only part of the decision. Check city, county, and land-manager fire restrictions before lighting any outdoor fire.

Nearby regional view

Explore Boston

About 12 miles away, the Boston hub looks more deeply at Boston, MA. It reflects that wider area rather than Waltham’s exact conditions.

About these readingsSources and local limits

Weather

Forecasts, alerts, and radar come from NOAA and the National Weather Service.

Air quality

This reading describes Boston Metro area, about 6 miles away. Conditions can differ at this exact spot.

Smoke

Satellite imagery shows smoke overhead. It cannot tell us how much smoke has reached breathing level.

This page represents Waltham, MA, so conditions can vary from street to street. Environmental data: AirNow · participating air agencies · preliminary real-time US AQI · NOAA Hazard Mapping System · satellite-observed smoke.