Current Conditions

Rosemont, California

58°F14°C

Clear

Wind

SW 2 mph4 km/h

Humidity

86%

Cloud Cover

12%

As of Wednesday, September 23, 2026 at 3:35 AM PDT

Today's Outlook

Day

Mostly clear and hot, with a high of 91°F33°C and morning low of 59°F15°C. Light wind from the WNW around 3 mph4 km/h.

Night

Mostly clear, with a low around 58°F14°C. Light wind from the SSW around 3 mph4 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 91°F33°C	Low 58°F14°C	Precip 0 in0 mm—	Cloud 8%	Wind WSW 3 mph4 km/h	Wednesday: Mostly clear and hot, with a high of 91°F33°C and morning low of 59°F15°C. Light wind from the WNW around 3 mph4 km/h. Wednesday Night: Mostly clear, with a low around 58°F14°C. Light wind from the SSW around 3 mph4 km/h.
Partly Cloudy	High 93°F34°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 46%	Wind SSW 4 mph7 km/h	Thursday: Mostly cloudy and hot, with a high of 93°F34°C and morning low of 62°F16°C. Light wind from the SW around 4 mph6 km/h. Thursday Night: Partly cloudy, with a low around 59°F15°C. Light wind from the S around 4 mph7 km/h.
Clear	High 88°F31°C	Low 63°F17°C	Precip 0 in0 mm—	Cloud 27%	Wind SSW 6 mph9 km/h	Friday: Partly cloudy and hot, with a high of 88°F31°C and morning low of 65°F19°C. Light wind from the SSW around 6 mph10 km/h. Friday Night: Partly cloudy, with a low around 63°F17°C. Light wind from the S around 5 mph9 km/h.
Clear	High 85°F29°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 30%	Wind SW 4 mph6 km/h	Saturday: Partly cloudy and warm, with a high of 85°F29°C and morning low of 60°F16°C. Light wind from the SW around 4 mph6 km/h. Dry air. Saturday Night: Partly cloudy, with a low around 59°F15°C. Light wind from the SSW around 4 mph7 km/h.
Clear	High 79°F26°C	Low 58°F14°C	Precip 0 in0.1 mm3%	Cloud 36%	Wind SSW 5 mph8 km/h	Sunday: Partly cloudy and warm, with a high of 79°F26°C and morning low of 59°F15°C. Light wind from the SSW around 5 mph8 km/h. Dry air. Sunday Night: Partly cloudy, with a low around 58°F14°C. Light wind from the SSW around 5 mph7 km/h.
Clear	High 84°F29°C	Low 56°F13°C	Precip 0 in0.1 mm3%	Cloud 15%	Wind WSW 4 mph6 km/h	Monday: Mostly clear and warm, with a high of 84°F29°C and morning low of 57°F14°C. Light wind from the WNW around 4 mph7 km/h. Dry air. Monday Night: Mostly clear, with a low around 56°F13°C. Light wind from the SSW around 4 mph6 km/h.
Clear	High 88°F31°C	Low 57°F14°C	Precip 0 in0.1 mm2%	Cloud 7%	Wind SW 4 mph6 km/h	Tuesday: Mostly clear and hot, with a high of 88°F31°C and morning low of 58°F14°C. Light wind from the W around 4 mph6 km/h. Dry air. Tuesday Night: Mostly clear, with a low around 57°F14°C. Light wind from the S around 4 mph6 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	91°F33°C	58°F14°C	0 in0 mm· —	8%	Clear	WSW 3 mph4 km/h
DayMostly clear and hot, with a high of 91°F33°C and morning low of 59°F15°C. Light wind from the WNW around 3 mph4 km/h. NightMostly clear, with a low around 58°F14°C. Light wind from the SSW around 3 mph4 km/h.
	ThursdaySep 24	93°F34°C	59°F15°C	0 in0 mm· —	46%	Partly Cloudy	SSW 4 mph7 km/h
DayMostly cloudy and hot, with a high of 93°F34°C and morning low of 62°F16°C. Light wind from the SW around 4 mph6 km/h. NightPartly cloudy, with a low around 59°F15°C. Light wind from the S around 4 mph7 km/h.
	FridaySep 25	88°F31°C	63°F17°C	0 in0 mm· —	27%	Clear	SSW 6 mph9 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 65°F19°C. Light wind from the SSW around 6 mph10 km/h. NightPartly cloudy, with a low around 63°F17°C. Light wind from the S around 5 mph9 km/h.
	SaturdaySep 26	85°F29°C	59°F15°C	0 in0 mm· —	30%	Clear	SW 4 mph6 km/h
DayPartly cloudy and warm, with a high of 85°F29°C and morning low of 60°F16°C. Light wind from the SW around 4 mph6 km/h. Dry air. NightPartly cloudy, with a low around 59°F15°C. Light wind from the SSW around 4 mph7 km/h.
	SundaySep 27	79°F26°C	58°F14°C	0 in0.1 mm· 3%	36%	Clear	SSW 5 mph8 km/h
DayPartly cloudy and warm, with a high of 79°F26°C and morning low of 59°F15°C. Light wind from the SSW around 5 mph8 km/h. Dry air. NightPartly cloudy, with a low around 58°F14°C. Light wind from the SSW around 5 mph7 km/h.
	MondaySep 28	84°F29°C	56°F13°C	0 in0.1 mm· 3%	15%	Clear	WSW 4 mph6 km/h
DayMostly clear and warm, with a high of 84°F29°C and morning low of 57°F14°C. Light wind from the WNW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 56°F13°C. Light wind from the SSW around 4 mph6 km/h.
	TuesdaySep 29	88°F31°C	57°F14°C	0 in0.1 mm· 2%	7%	Clear	SW 4 mph6 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 58°F14°C. Light wind from the W around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 57°F14°C. Light wind from the S around 4 mph6 km/h.
	WednesdaySep 30	89°F32°C	58°F14°C	0 in0.1 mm· 2%	17%	Clear	SSW 3 mph5 km/h
DayMostly clear and hot, with a high of 89°F32°C and morning low of 59°F15°C. Light wind from the WSW around 3 mph5 km/h. Dry air. NightMostly clear, with a low around 58°F14°C. Light wind from the SSE around 4 mph6 km/h.
	ThursdayOct 1	88°F31°C	59°F15°C	0.02 in0.5 mm· 3%	36%	Clear	SSW 4 mph6 km/h
DayPartly cloudy and hot, with a high of 88°F31°C and morning low of 60°F16°C. Light wind from the WSW around 4 mph6 km/h. Dry air. NightPartly cloudy, with a low around 59°F15°C. Light wind from the S around 4 mph6 km/h.
	FridayOct 2	88°F31°C	60°F15°C	0 in0.1 mm· 1%	19%	Clear	WNW 5 mph8 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 62°F16°C. Light wind from the NW around 5 mph8 km/h. Dry air. NightMostly clear, with a low around 60°F15°C. Light wind from the W around 4 mph7 km/h.
	SaturdayOct 3	89°F32°C	59°F15°C	0.01 in0.2 mm· 2%	11%	Clear	WNW 4 mph7 km/h
DayMostly clear and hot, with a high of 89°F32°C and morning low of 60°F15°C. Light wind from the NW around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 59°F15°C. Light wind from the W around 4 mph7 km/h.
	SundayOct 4	88°F31°C	59°F15°C	0.01 in0.3 mm· 2%	15%	Clear	W 4 mph6 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 60°F16°C. Light wind from the W around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 59°F15°C. Light wind from the SSW around 4 mph6 km/h.
	MondayOct 5	88°F31°C	59°F15°C	0.02 in0.4 mm· 3%	15%	Clear	WSW 4 mph6 km/h
DayMostly clear and hot, with a high of 88°F31°C and morning low of 60°F15°C. Light wind from the W around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 59°F15°C. Light wind from the SSW around 4 mph6 km/h.
	TuesdayOct 6	89°F32°C	60°F15°C	0.01 in0.3 mm· 3%	13%	Clear	SW 4 mph6 km/h
DayMostly clear and hot, with a high of 89°F32°C and morning low of 61°F16°C. Light wind from the W around 4 mph6 km/h. Dry air. NightMostly clear, with a low around 60°F15°C. Light wind from the SSW around 4 mph6 km/h.
	WednesdayOct 7	87°F31°C	60°F16°C	0.02 in0.5 mm· 4%	14%	Clear	WSW 4 mph7 km/h
DayMostly clear and hot, with a high of 87°F31°C and morning low of 61°F16°C. Light wind from the W around 4 mph7 km/h. Dry air. NightMostly clear, with a low around 60°F16°C. Light wind from the SSW around 4 mph7 km/h.

Nearby Cities

Arden-Arcade4 mi6 km Rancho Cordova4 mi7 km Florin5 mi7 km Carmichael5 mi8 km Vineyard6 mi10 km Sacramento7 mi12 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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 38.5519°N, 121.3647°W·Elevation: 15m·Timezone: America/Los_Angeles·Population: 22,681