As of 18:35 PDT

Weather in Union, CA

80°

Union, Thursday, 8 October, 18:35

Clear. Feels like 80°. High 93°, low 59°.

Pressure29.74 inHg

Wind6.9 mph S

Humidity48%

Visibility6.2 mi

Dew point59°

See detailed hourly forecast

Monthly outlook for Union, CA: average high 82.4°, average low 54.6°. That is 3.7° above the climate normal for October. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 8 October (93°), the coolest 12 October (47.7°).

82.4°/54.6°

Average high / low

+3.7°

Above normal

0 / 2

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	79.8°	76.8°	+1.6°
18 October – 27 October	86.7°	73.1°	+7.5°
28 October – 6 November	at normal	69.2°	—

October records over 66 years

103.3°1 October 2020All-time high

38.3°28 October 2023All-time low

Climate normals and records are computed from the nearest reference point — Fetters Hot Springs (10 mi).

Fri, 0984° / 55°

84 °

Union, Friday, 9 October

Clear. High 84°, low 55°.

Pressure29.74 inHg

Wind4.1 mph SW

Humidity36%

Visibility6.2 mi

Dew point52°

Sat, 1068° / 49°

68 °

Union, Saturday, 10 October

Clear. High 68°, low 49°.

Pressure29.62 inHg

Wind7.3 mph S

Humidity49%

Visibility6.2 mi

Dew point47°

Sun, 1173° / 48°

73 °

Union, Sunday, 11 October

Clear. High 73°, low 48°.

Pressure29.53 inHg

Wind2.5 mph N

Humidity23%

Visibility6.2 mi

Dew point30°

Mon, 1270° / 48°

70 °

Union, Monday, 12 October

Clear. High 70°, low 48°.

Pressure29.85 inHg

Wind0.9 mph N

Humidity28%

Visibility6.2 mi

Dew point32°

Tue, 1375° / 49°

75 °

Union, Tuesday, 13 October

Clear. High 75°, low 49°.

Pressure30.06 inHg

Wind9.6 mph W

Humidity23%

Visibility—

Dew point27°

Wed, 1478° / 48°

78 °

Union, Wednesday, 14 October

Mostly clear. High 78°, low 48°.

Pressure30.12 inHg

Wind5.9 mph SW

Humidity30%

Visibility—

Dew point35°

Thu, 1588° / 56°

88 °

Union, Thursday, 15 October

Clear. High 88°, low 56°.

Pressure30.09 inHg

Wind11.5 mph N

Humidity26%

Visibility—

Dew point38°

Fri, 1683° / 59°

83 °

Union, Friday, 16 October

Clear. High 83°, low 59°.

Pressure30.12 inHg

Wind8 mph N

Humidity14%

Visibility—

Dew point22°

Sat, 1786° / 58°

86 °

Union, Saturday, 17 October

Clear. High 86°, low 58°.

Pressure30.12 inHg

Wind4.7 mph S

Humidity15%

Visibility—

Dew point25°

Sun, 1885° / 58°

85 °

Union, Sunday, 18 October

Clear. High 85°, low 58°.

Pressure30.09 inHg

Wind5.2 mph S

Humidity18%

Visibility—

Dew point29°

Mon, 1985° / 56°

85 °

Union, Monday, 19 October

Clear. High 85°, low 56°.

Pressure30.06 inHg

Wind4.6 mph SW

Humidity19%

Visibility—

Dew point29°

Tue, 2085° / 56°

85 °

Union, Tuesday, 20 October

Clear. High 85°, low 56°.

Pressure30.03 inHg

Wind5.4 mph SW

Humidity17%

Visibility—

Dew point27°

Wed, 2187° / 56°

87 °

Union, Wednesday, 21 October

Clear. High 87°, low 56°.

Pressure30.00 inHg

Wind4.4 mph S

Humidity21%

Visibility—

Dew point32°

Thu, 2288° / 59°

88 °

Union, Thursday, 22 October

Clear. High 88°, low 59°.

Pressure30.03 inHg

Wind4.8 mph S

Humidity17%

Visibility—

Dew point29°

Fri, 2389° / 59°

89 °

Union, Friday, 23 October

Clear. High 89°, low 59°.

Pressure29.97 inHg

Wind4.3 mph S

Humidity17%

Visibility—

Dew point29°

From day 17 onward the outlook is built from 60-year climate statistics

Sat, 2473° / 52°

0.13

73 °

Union, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high73°

Average low52°

Average precipitation0.13 in

Chance of precipitation13%

Record high92° (2017)

Record low44° (1971)

Sun, 2572° / 52°

0.08

72 °

Union, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high72°

Average low52°

Average precipitation0.08 in

Chance of precipitation15%

Record high92° (2003)

Record low44° (1989)

Mon, 2672° / 51°

0.06

72 °

Union, Monday, 26 October

Climate normal for this date — 60-year average.

Average high72°

Average low51°

Average precipitation0.06 in

Chance of precipitation13%

Record high92° (2003)

Record low40° (2023)

Tue, 2771° / 51°

0.04

71 °

Union, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high71°

Average low51°

Average precipitation0.04 in

Chance of precipitation7%

Record high91° (2003)

Record low40° (2023)

Wed, 2870° / 50°

0.08

70 °

Union, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high70°

Average low50°

Average precipitation0.08 in

Chance of precipitation18%

Record high90° (2003)

Record low38° (2023)

Thu, 2970° / 49°

0.07

70 °

Union, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.07 in

Chance of precipitation22%

Record high83° (1965)

Record low40° (1971)

Fri, 3069° / 49°

0.06

69 °

Union, Friday, 30 October

Climate normal for this date — 60-year average.

Average high69°

Average low49°

Average precipitation0.06 in

Chance of precipitation18%

Record high85° (1966)

Record low40° (2023)

Sat, 3170° / 49°

0.04

70 °

Union, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.04 in

Chance of precipitation17%

Record high87° (1966)

Record low39° (2023)

Sun, 0170° / 49°

0.07

70 °

Union, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.07 in

Chance of precipitation15%

Record high86° (1967)

Record low37° (2003)

Mon, 0270° / 49°

0.05

70 °

Union, Monday, 2 November

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.05 in

Chance of precipitation13%

Record high86° (1967)

Record low41° (1974)

Tue, 0370° / 49°

0.04

70 °

Union, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high70°

Average low49°

Average precipitation0.04 in

Chance of precipitation13%

Record high85° (2018)

Record low37° (2022)

Wed, 0469° / 49°

0.03

69 °

Union, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high69°

Average low49°

Average precipitation0.03 in

Chance of precipitation12%

Record high83° (1976)

Record low40° (1973)

Thu, 0568° / 49°

0.08

68 °

Union, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high68°

Average low49°

Average precipitation0.08 in

Chance of precipitation15%

Record high83° (2020)

Record low41° (2004)

Fri, 0667° / 50°

0.07

67 °

Union, Friday, 6 November

Climate normal for this date — 60-year average.

Average high67°

Average low50°

Average precipitation0.07 in

Chance of precipitation20%

Record high81° (1976)

Record low41° (1972)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Union, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Union, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.