Current Conditions

Waltham, Massachusetts

54°F12°C

Partly Cloudy

Wind

NNE 9 mph14 km/h

Humidity

82%

Cloud Cover

65%

As of Wednesday, September 23, 2026 at 6:52 AM EDT

Today's Outlook

Day

Partly cloudy and mild, with a high of 63°F17°C and morning low of 54°F12°C. Breezy from the NE at 12 to 14 mph20 to 23 km/h. Dry air.

Night

Partly cloudy, with a low around 50°F10°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 63°F17°C	Low 50°F10°C	Precip 0 in0 mm—	Cloud 44%	Wind NE 10 mph16 km/h	Wednesday: Partly cloudy and mild, with a high of 63°F17°C and morning low of 54°F12°C. Breezy from the NE at 12 to 14 mph20 to 23 km/h. Dry air. Wednesday Night: Partly cloudy, with a low around 50°F10°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h.
Partly Cloudy	High 64°F18°C	Low 48°F9°CFeels 44°F7°C	Precip 0 in0 mm—	Cloud 47%	Wind NE 9 mph15 km/h	Thursday: Partly cloudy and mild, with a high of 64°F18°C and morning low of 51°F11°C. Breezy from the NE at 11 to 12 mph17 to 19 km/h. Dry air. Thursday Night: Partly cloudy, with a low around 48°F9°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h.
Light Rain	High 63°F17°C	Low 51°F10°C	Precip 0.17 in4.4 mm53%	Cloud 94%	Wind NNE 13 mph20 km/h	Friday: Overcast and mild, with a high of 63°F17°C and morning low of 54°F12°C. Breezy from the NNE at 13 to 15 mph21 to 23 km/h. 35% chance of light rain throughout the day. Dry air. Friday Night: Overcast, with a low around 51°F10°C. Breezy from the NNE at 12 to 14 mph19 to 22 km/h. 53% chance of light rain in the evening.
Rain	High 59°F15°C	Low 57°F14°C	Precip 1.07 in27.2 mm92%	Cloud 98%	Wind NNE 16 mph26 km/h	Saturday: Overcast and mild, with a high of 59°F15°C. Windy from the NNE at 17 mph27 km/h. 88% chance of rain throughout the day. Saturday Night: Overcast, with a low around 57°F14°C. Windy from the NNE at 16 to 17 mph26 to 28 km/h. 92% chance of rain throughout the night.
Rain	High 61°F16°C	Low 58°F14°C	Precip 1.22 in30.9 mm98%	Cloud 99%	Wind NE 14 mph22 km/h	Sunday: Overcast and mild, with a high of 61°F16°C. Breezy from the NE at 14 to 15 mph22 to 24 km/h. 98% chance of rain throughout the day. Sunday Night: Overcast, with a low around 58°F14°C. Windy from the NE at 14 to 17 mph22 to 27 km/h. 97% chance of rain throughout the night.
Light Rain	High 62°F17°C	Low 58°F15°C	Precip 0.35 in8.9 mm80%	Cloud 95%	Wind NNE 8 mph12 km/h	Monday: Overcast and mild, with a high of 62°F17°C. Breezy from the N at 8 mph13 km/h. 72% chance of light rain throughout the day. Monday Night: Overcast, with a low around 59°F15°C. Breezy from the NNE at 7 to 9 mph12 to 14 km/h. 80% chance of light rain throughout the night.
Drizzle	High 67°F20°C	Low 58°F14°C	Precip 0.03 in0.8 mm15%	Cloud 80%	Wind NW 5 mph8 km/h	Tuesday: Overcast and mild, with a high of 67°F20°C and morning low of 58°F15°C. Light wind from the NW around 5 mph8 km/h. Tuesday Night: Mostly cloudy, with a low around 58°F14°C. Light wind from the WNW around 5 mph8 km/h. 15% chance of drizzle overnight.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	63°F17°C	50°F10°C	0 in0 mm· —	44%	Partly Cloudy	NE 10 mph16 km/h
DayPartly cloudy and mild, with a high of 63°F17°C and morning low of 54°F12°C. Breezy from the NE at 12 to 14 mph20 to 23 km/h. Dry air. NightPartly cloudy, with a low around 50°F10°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h.
	ThursdaySep 24	64°F18°C	48°F9°C Feels 44°F7°C	0 in0 mm· —	47%	Partly Cloudy	NE 9 mph15 km/h
DayPartly cloudy and mild, with a high of 64°F18°C and morning low of 51°F11°C. Breezy from the NE at 11 to 12 mph17 to 19 km/h. Dry air. NightPartly cloudy, with a low around 48°F9°C. Breezy from the NNE at 8 to 9 mph13 to 14 km/h.
	FridaySep 25	63°F17°C	51°F10°C	0.17 in4.4 mm· 53%	94%	Light Rain	NNE 13 mph20 km/h
DayOvercast and mild, with a high of 63°F17°C and morning low of 54°F12°C. Breezy from the NNE at 13 to 15 mph21 to 23 km/h. 35% chance of light rain throughout the day. Dry air. NightOvercast, with a low around 51°F10°C. Breezy from the NNE at 12 to 14 mph19 to 22 km/h. 53% chance of light rain in the evening.
	SaturdaySep 26	59°F15°C	57°F14°C	1.07 in27.2 mm· 92%	98%	Rain	NNE 16 mph26 km/h
DayOvercast and mild, with a high of 59°F15°C. Windy from the NNE at 17 mph27 km/h. 88% chance of rain throughout the day. NightOvercast, with a low around 57°F14°C. Windy from the NNE at 16 to 17 mph26 to 28 km/h. 92% chance of rain throughout the night.
	SundaySep 27	61°F16°C	58°F14°C	1.22 in30.9 mm· 98%	99%	Rain	NE 14 mph22 km/h
DayOvercast and mild, with a high of 61°F16°C. Breezy from the NE at 14 to 15 mph22 to 24 km/h. 98% chance of rain throughout the day. NightOvercast, with a low around 58°F14°C. Windy from the NE at 14 to 17 mph22 to 27 km/h. 97% chance of rain throughout the night.
	MondaySep 28	62°F17°C	58°F15°C	0.35 in8.9 mm· 80%	95%	Light Rain	NNE 8 mph12 km/h
DayOvercast and mild, with a high of 62°F17°C. Breezy from the N at 8 mph13 km/h. 72% chance of light rain throughout the day. NightOvercast, with a low around 59°F15°C. Breezy from the NNE at 7 to 9 mph12 to 14 km/h. 80% chance of light rain throughout the night.
	TuesdaySep 29	67°F20°C	58°F14°C	0.03 in0.8 mm· 15%	80%	Drizzle	NW 5 mph8 km/h
DayOvercast and mild, with a high of 67°F20°C and morning low of 58°F15°C. Light wind from the NW around 5 mph8 km/h. NightMostly cloudy, with a low around 58°F14°C. Light wind from the WNW around 5 mph8 km/h. 15% chance of drizzle overnight.
	WednesdaySep 30	71°F22°C	57°F14°C	0.01 in0.2 mm· 6%	66%	Partly Cloudy	WSW 4 mph7 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 59°F15°C. Light wind from the WSW around 4 mph6 km/h. NightMostly cloudy, with a low around 57°F14°C. Light wind from the SW around 5 mph8 km/h.
	ThursdayOct 1	74°F23°C	58°F15°C	0.04 in0.9 mm· 8%	62%	Partly Cloudy	SSW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 60°F16°C. Breezy from the SSW at 6 to 7 mph10 to 12 km/h. NightMostly cloudy, with a low around 58°F15°C. Breezy from the SSW at 7 to 8 mph11 to 12 km/h.
	FridayOct 2	73°F23°C	61°F16°C	0.17 in4.4 mm· 23%	66%	Showers	SW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 62°F17°C. Breezy from the SW at 7 to 8 mph12 to 12 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the SW at 7 mph11 km/h. 21% chance of showers throughout the night.
	SaturdayOct 3	69°F21°C	58°F15°C	0.17 in4.4 mm· 24%	66%	Showers	W 7 mph11 km/h
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 59°F15°C. Breezy from the W at 7 mph11 km/h. 21% chance of showers throughout the day. NightMostly cloudy, with a low around 58°F15°C. Breezy from the WSW at 7 mph11 km/h. 24% chance of showers throughout the night.
	SundayOct 4	67°F20°C	57°F14°C	0.24 in6.2 mm· 30%	71%	Light Rain	SW 7 mph11 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 58°F14°C. Breezy from the SSW at 7 mph11 km/h. 30% chance of light rain throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the SW at 7 mph11 km/h. 29% chance of showers throughout the night.
	MondayOct 5	67°F19°C	56°F13°C	0.16 in4.1 mm· 23%	63%	Showers	W 7 mph11 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 57°F14°C. Breezy from the W at 7 to 8 mph12 to 13 km/h. 21% chance of showers throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the W at 7 mph11 km/h. 23% chance of showers throughout the night.
	TuesdayOct 6	66°F19°C	54°F12°C	0.13 in3.4 mm· 18%	53%	Showers	W 7 mph12 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 55°F13°C. Breezy from the W at 8 mph12 km/h. 18% chance of showers throughout the day. Dry air. NightPartly cloudy, with a low around 54°F12°C. Breezy from the W at 7 mph11 km/h. 15% chance of drizzle throughout the night.
	WednesdayOct 7	63°F17°C	52°F11°C	0.12 in3.1 mm· 16%	53%	Showers	WNW 7 mph12 km/h
DayMostly cloudy and mild, with a high of 63°F17°C and morning low of 52°F11°C. Breezy from the WNW at 8 to 9 mph12 to 14 km/h. 15% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 52°F11°C. Breezy from the W at 7 mph12 km/h. 16% chance of showers throughout the night.

Nearby Cities

Watertown3 mi4 km Newton3 mi5 km Belmont3 mi5 km Brighton4 mi7 km Chestnut Hill5 mi8 km Arlington5 mi8 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 42.3765°N, 71.2356°W·Elevation: 20m·Timezone: America/New_York·Population: 63,378