Observed 7:47 AM PDT at KRIV

March ARB, CA weather

Partly cloudy and 57°14°, 13°7° colder than a typical Oct 23.

Mostly agree

Now 57°14°

Partly sunny

Wind: 9 mph15 km/h; From the south-southeast. Up to 10 mph16 km/h through 8 PM
Dew point: 54°12°; Comfortable
UV index: 0Low; Moderate 12–4 PM · peak 4
Air today: 37Good; EPA forecast · Ozone
Pressure: 29.98 inHg1015 hPa; Steady over the last 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 66°19° today at 3 PM
Above 60°16° tomorrow by 10 AM

This morningUp to 61°16° by 11 AM · rain chance 10% · Partly cloudy
This afternoonNear 64°18° · rain chance 10% · Partly cloudy
TonightDown to 53°12° by 5 AM · rain chance 10% · Partly cloudy
Tomorrow morningUp to 67°19° by 11 AM · Clear
Tomorrow afternoonNear 71°22° · Clear
Tomorrow nightDown to 55°13° by 5 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 8a	Partly sunny	53°12° (likely 53°12° to 56°13°)	53°12°	5%	5 mph8 km/h from SE, gusts 7 mph11 km/h	100%	43%	0
Fri 9a	Partly sunny	56°13° (likely 56°13° to 59°15°)	56°13°	5%	5 mph8 km/h from S, gusts 5 mph9 km/h	98%	43%	0
Fri 10a	Partly sunny	58°14° (likely 58°14° to 61°16°)	58°14°	5%	5 mph8 km/h from S, gusts 5 mph8 km/h	91%	60%	1
Fri 11a	Partly sunny	61°16° (likely 61°16° to 64°18°)	61°16°	10%	5 mph8 km/h from SE, gusts 5 mph8 km/h	81%	45%	2
Fri 12p	Partly sunny	63°17° (likely 63°17° to 66°19°)	63°17°	10%	0 mph0 km/h, gusts 5 mph8 km/h	74%	50%	3
Fri 1p	Partly sunny	65°18° (likely 65°18° to 67°19°)	65°18°	10%	5 mph8 km/h from W, gusts 7 mph11 km/h	70%	32%	4
Fri 2p	Mostly sunny	65°18° (likely 65°18° to 68°20°)	65°18°	10%	5 mph8 km/h from NW, gusts 8 mph13 km/h	71%	28%	4
Fri 3p	Sunny	66°19° (likely 65°18° to 68°20°)	66°19°	10%	5 mph8 km/h from W, gusts 9 mph15 km/h	70%	19%	3
Fri 4p	Partly sunny	66°19° (likely 64°18° to 68°20°)	66°19°	10%	5 mph8 km/h from W, gusts 10 mph16 km/h	70%	41%	2
Fri 5p	Partly sunny	65°18° (likely 62°17° to 66°19°)	65°18°	10%	10 mph16 km/h from W, gusts 10 mph16 km/h	74%	66%	1
Fri 6p	Partly cloudy	64°18° (likely 59°15° to 64°18°)	64°18°	10%	10 mph16 km/h from W, gusts 10 mph16 km/h	80%	69%	0
Fri 7p	Partly cloudy	62°17° (likely 58°14° to 63°17°)	63°17°	10%	5 mph8 km/h from NW, gusts 6 mph10 km/h	86%	64%	0
Fri 8p	Partly cloudy	62°17° (likely 57°14° to 62°17°)	62°17°	10%	5 mph8 km/h from NW, gusts 8 mph13 km/h	88%	69%	0
Fri 9p	Clear	61°16° (likely 56°13° to 61°16°)	61°16°	10%	5 mph8 km/h from W, gusts 7 mph11 km/h	87%	33%	0
Fri 10p	Partly cloudy	60°16° (likely 55°13° to 60°16°)	60°16°	10%	0 mph0 km/h, gusts 7 mph12 km/h	89%	26%	0
Fri 11p	Clear	59°15° (likely 54°12° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 4 mph7 km/h	89%	1%	0
Sat 12a	Clear	58°14° (likely 53°12° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	3%	0
Sat 1a	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 4 mph6 km/h	90%	17%	0
Sat 2a	Clear	56°13° (likely 53°12° to 56°13°)	56°13°	0%	0 mph0 km/h, gusts 4 mph6 km/h	92%	20%	0
Sat 3a	Clear	55°13° (likely 53°12° to 55°13°)	55°13°	0%	0 mph0 km/h, gusts 3 mph5 km/h	93%	22%	0
Sat 4a	Mostly clear	54°12° (likely 52°11° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	94%	19%	0
Sat 5a	Clear	53°12° (likely 52°11° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	94%	3%	0
Sat 6a	Clear	53°12° (likely 50°10° to 53°12°)	53°12°	0%	0 mph0 km/h, gusts 3 mph5 km/h	95%	3%	0
Sat 7a	Sunny	52°11° (likely 49°9° to 53°12°)	52°11°	0%	0 mph0 km/h, gusts 3 mph5 km/h	97%	3%	0
Sat 8a	Sunny	54°12° (likely 50°10° to 54°12°)	54°12°	0%	0 mph0 km/h, gusts 4 mph6 km/h	91%	2%	0
Sat 9a	Sunny	59°15° (likely 54°12° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 5 mph8 km/h	75%	2%	1
Sat 10a	Sunny	63°17° (likely 60°16° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 8 mph13 km/h	64%	1%	3
Sat 11a	Sunny	67°19° (likely 65°18° to 67°19°)	67°19°	0%	0 mph0 km/h, gusts 8 mph13 km/h	54%	0%	4
Sat 12p	Sunny	70°21° (likely 68°20° to 72°22°)	70°21°	0%	5 mph8 km/h from NE, gusts 9 mph15 km/h	49%	1%	5
Sat 1p	Sunny	72°22° (likely 70°21° to 75°24°)	72°22°	0%	10 mph16 km/h from N, gusts 12 mph19 km/h	45%	2%	6
Sat 2p	Sunny	73°23° (likely 71°22° to 76°24°)	73°23°	0%	10 mph16 km/h from NW, gusts 13 mph20 km/h	44%	4%	5
Sat 3p	Sunny	73°23° (likely 71°22° to 77°25°)	73°23°	0%	10 mph16 km/h from N, gusts 12 mph19 km/h	44%	4%	4
Sat 4p	Sunny	73°23° (likely 71°22° to 76°24°)	73°23°	0%	10 mph16 km/h from N, gusts 12 mph19 km/h	45%	4%	3
Sat 5p	Sunny	72°22° (likely 69°21° to 74°23°)	72°22°	0%	10 mph16 km/h from N, gusts 14 mph23 km/h	48%	9%	2
Sat 6p	Clear	70°21° (likely 66°19° to 70°21°)	70°21°	0%	5 mph8 km/h from N, gusts 14 mph22 km/h	54%	8%	0
Sat 7p	Clear	70°21° (likely 62°17° to 70°21°)	71°22°	0%	5 mph8 km/h from N, gusts 13 mph21 km/h	55%	2%	0
Sat 8p	Clear	65°18° (likely 60°16° to 65°18°)	65°18°	0%	5 mph8 km/h from NW, gusts 13 mph20 km/h	67%	0%	0
Sat 9p	Clear	66°19° (likely 58°14° to 66°19°)	66°19°	0%	5 mph8 km/h from NW, gusts 7 mph11 km/h	64%	0%	0
Sat 10p	Clear	65°18° (likely 56°13° to 65°18°)	65°18°	0%	5 mph8 km/h from W, gusts 6 mph10 km/h	65%	0%	0
Sat 11p	Clear	61°16° (likely 54°12° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 5 mph8 km/h	72%	0%	0
Sun 12a	Clear	62°17° (likely 52°11° to 62°17°)	62°17°	0%	0 mph0 km/h, gusts 4 mph6 km/h	68%	0%	0
Sun 1a	Clear	61°16° (likely 51°11° to 61°16°)	61°16°	0%	5 mph8 km/h from E, gusts 4 mph7 km/h	69%	1%	0
Sun 2a	Clear	58°14° (likely 50°10° to 58°14°)	58°14°	0%	5 mph8 km/h from E, gusts 5 mph7 km/h	75%	0%	0
Sun 3a	Clear	58°14° (likely 49°9° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 4 mph6 km/h	72%	0%	0
Sun 4a	Clear	58°14° (likely 48°9° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 4 mph7 km/h	70%	0%	0
Sun 5a	Clear	55°13° (likely 47°8° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 4 mph7 km/h	75%	0%	0
Sun 6a	Clear	54°12° (likely 45°7° to 61°16°)	54°12°	0%	5 mph8 km/h from E, gusts 4 mph7 km/h	78%	0%	0
Sun 7a	Sunny	54°12° (likely 45°7° to 61°16°)	54°12°	0%	5 mph8 km/h from E, gusts 4 mph6 km/h	77%	0%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 23. Partly sunny. High 67°19°, low 52°11°. Typical 80°27° / 47°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 53°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 67. Southwest wind 0 to 10 mph.
Tonight: Mostly clear, with a low around 52. South wind 0 to 10 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–68°20°
Low, likely
52°11°–56°13°
Typical high / low
80°27° / 47°8°
Wind
9 mph14 km/h, gusts 15 mph24 km/h
UV peak
4
Tomorrow, Oct 24. Mostly sunny. High 74°23°, low 54°12°. Typical 80°27° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 65°18°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Official NWS forecast
Day: Sunny, with a high near 74. Northeast wind 0 to 10 mph, with gusts as high as 20 mph.
Night: Mostly clear, with a low around 54. East wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
71°22°–77°25°
Low, likely
49°9°–54°12°
Typical high / low
80°27° / 46°8°
Wind
12 mph20 km/h, gusts 18 mph29 km/h
UV peak
6
Sunday, Oct 25. Mostly sunny. High 77°25°, low 55°13°. Typical 80°27° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 66°19°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 77. North wind 0 to 5 mph.
Night: Mostly clear, with a low around 55.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
74°23°–79°26°
Low, likely
47°8°–55°13°
Typical high / low
80°27° / 46°8°
Wind
8 mph13 km/h, gusts 14 mph22 km/h
UV peak
6
Monday, Oct 26. Mostly sunny. High 78°26°, low 55°13°. Typical 79°26° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 77°25°
  Dry
3. Evening
  6 PM–midnight
  Clear, 65°18°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 78.
Night: Mostly clear, with a low around 55.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
75°24°–80°27°
Low, likely
48°9°–60°16°
Typical high / low
79°26° / 46°8°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
5
Tuesday, Oct 27. Mostly sunny. High 76°24°, low 54°12°. Typical 79°26° / 46°8°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 52°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 76.
Night: Partly cloudy, with a low around 54.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
73°23°–77°25°
Low, likely
46°8°–59°15°
Typical high / low
79°26° / 46°8°
Wind
10 mph16 km/h
UV peak
5
Wednesday, Oct 28. Partly sunny. High 74°23°, low 54°12°. Typical 79°26° / 45°7°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 53°11°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 75°24°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 53°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 74.
Night: Partly cloudy, with a low around 54.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
72°22°–77°25°
Low, likely
45°7°–57°14°
Typical high / low
79°26° / 45°7°
Wind
5 mph8 km/h, gusts 13 mph21 km/h
UV peak
5
Thursday, Oct 29. Partly sunny. High 70°21°, low 53°12°. Typical 78°26° / 45°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Mostly cloudy, with a low around 53.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
69°21°–76°24°
Low, likely
47°8°–58°14°
Typical high / low
78°26° / 45°7°
Wind
7 mph11 km/h, gusts 13 mph22 km/h
UV peak
5
Friday, Oct 30. Cloudy. High 70°21°, low 54°12°. Typical 78°26° / 45°7°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 64°18°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  20% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–73°23°
Low, likely
46°8°–58°14°
Typical high / low
78°26° / 45°7°
Wind
7 mph11 km/h, gusts 13 mph20 km/h
UV peak
5
Saturday, Oct 31. Drizzle. High 64°18°, low 55°13°. Typical 78°26° / 44°7°. Rain 0.6 in15 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 59°15°
  20% chance · 0.02 in0.6 mm
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 61°16°
  30% chance · 0.5 in13 mm
4. Overnight
  midnight–6 AM
  Showers, 60°15°
  40% chance · 0.29 in7.4 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
56°13°–70°21°
Low, likely
52°11°–60°16°
Typical high / low
78°26° / 44°7°
Wind
6 mph10 km/h, gusts 12 mph19 km/h
UV peak
1
Sunday, Nov 1. Showers. High 67°19°, low 57°14°. Typical 78°26° / 44°7°. Rain 1 in25 mm, 50% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Drizzle, 60°16°
  40% chance · 0.55 in14 mm
2. Afternoon
  noon–6 PM
  Drizzle, 65°19°
  50% chance · 0.27 in6.8 mm
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  50% chance · 0.1 in2.6 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–67°19°
Low, likely
53°12°–60°16°
Typical high / low
78°26° / 44°7°
Wind
17 mph27 km/h, gusts 23 mph36 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 67°, low 52°.
Tomorrow
Dry, high 74°, low 54°, warming up.
Sunday
Dry, high 77°, low 55°, warming up.
Rest of week
Highs 64–78°; chance of precipitation on Sunday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (SGX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Santa Ana River at MWD Crossing near Arlington

11 mi

Level: 4.3 ft
Flow: 134 cfs

Reading from Fri 7 AM · NWS gauge page

San Timoteo Creek near Loma Linda

12 mi

Level: 1.2 ft
Flow: 28 cfs

Reading from Fri 6:30 AM · NWS gauge page

Santa Ana River at E St near San Bernardino

12 mi

Level: 3.2 ft
Flow: 84 cfs

Reading from Fri 6 AM · NWS gauge page

Lytle Creek near Colton

13 mi

Level: 2.1 ft
Flow: 4 cfs

Reading from Fri 6:15 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 49% less heating than a typical week.

This week 9Typical 17

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 54°F).

Open the windows?

Today, 11:00 AM–10:00 PM

Good stretch to open the windows.

Is this typical?

MARCH AFB · official normals 1991–2020 · records 1949–2026

Oct 23, today vs a typical year

Today’s expected high is 13°7° colder than typical.

Last 7 days vs normal

On average 15°8° warmer than normal (daily mean temperature).

+15°+8°SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23

March ARB weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 11 h 5 min; Losing 2 min 2 s a day; shortest Dec 21, 1 h 11 min less
Golden hour: 5:31–6:21 PM; Morning 6:45–7:35 AM
Blue hour: 6:21–6:30 PM; Morning 6:35–6:45 AM; first light 6:35 AM

Stars tonight? Good

Mostly clear 11 PM–6:36 AM; moon 96% lit, sets 5:24 AM.

Moon

Waxing gibbous

92% lit · growing

Today: sets 4:20 AM · rises 4:34 PM
Full moon: Oct 25
New moon: Nov 8

Looking east from March ARB. The highest point on the skyline is about 18,100 ft, 5 mi away.Skyline from USGS elevation data, heights drawn up to 5× taller. Sky, sun and moon as they are now.