As of 21:24 MDT

Weather in Altvan, WY

65°

Altvan, Saturday, 10 October, 21:24

Overcast. Feels like 64°. High 78°, low 54°.

Pressure29.62 inHg

Wind7 mph NW

Humidity42%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

Monthly outlook for Altvan, WY: average high 64.8°, average low 46.8°. That is 3.6° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 10 October (78°), the coolest 17 October (31°).

64.8°/46.8°

Average high / low

+3.6°

Above normal

3 / 3

Wet days / normal

0.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	62.5°	58.9°	+2°
20 October – 29 October	68.7°	55.7°	+7.2°
30 October – 8 November	at normal	49.6°	—

October records over 66 years

83.8°2 October 2024All-time high

-3.8°26 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Cheyenne (5 mi).

Sun, 1176° / 54°

76 °

Altvan, Sunday, 11 October

Light rain. High 76°, low 54°.

Pressure29.68 inHg

Wind13.6 mph SE

Humidity30%

Visibility6.2 mi

Dew point38°

Mon, 1274° / 49°

0.01

74 °

Altvan, Monday, 12 October

Light rain. High 74°, low 49°.

Pressure29.74 inHg

Wind1.8 mph E

Humidity27%

Visibility6.2 mi

Dew point35°

Tue, 1359° / 47°

59 °

Altvan, Tuesday, 13 October

Overcast. High 59°, low 47°.

Pressure29.91 inHg

Wind8.3 mph S

Humidity68%

Visibility6.2 mi

Dew point44°

Wed, 1448° / 42°

0.28

48 °

Altvan, Wednesday, 14 October

Light rain. High 48°, low 42°.

Pressure30.24 inHg

Wind8.5 mph E

Humidity90%

Visibility3.7 mi

Dew point41°

Thu, 1549° / 42°

0.16

49 °

Altvan, Thursday, 15 October

Light rain. High 49°, low 42°.

Pressure30.33 inHg

Wind13.2 mph NE

Humidity78%

Visibility—

Dew point41°

Fri, 1649° / 37°

0.12

49 °

Altvan, Friday, 16 October

Light rain. High 49°, low 37°.

Pressure30.62 inHg

Wind13.8 mph E

Humidity78%

Visibility—

Dew point37°

Sat, 1756° / 31°

56 °

Altvan, Saturday, 17 October

Clear. High 56°, low 31°.

Pressure30.33 inHg

Wind16.6 mph S

Humidity41%

Visibility—

Dew point25°

Sun, 1868° / 49°

68 °

Altvan, Sunday, 18 October

Clear. High 68°, low 49°.

Pressure30.12 inHg

Wind13 mph W

Humidity25%

Visibility—

Dew point27°

Mon, 1968° / 49°

68 °

Altvan, Monday, 19 October

Mostly clear. High 68°, low 49°.

Pressure30.12 inHg

Wind9.2 mph S

Humidity24%

Visibility—

Dew point26°

Tue, 2070° / 51°

70 °

Altvan, Tuesday, 20 October

Clear. High 70°, low 51°.

Pressure29.97 inHg

Wind20.6 mph W

Humidity20%

Visibility—

Dew point22°

Wed, 2164° / 49°

64 °

Altvan, Wednesday, 21 October

Clear. High 64°, low 49°.

Pressure30.09 inHg

Wind13.1 mph S

Humidity24%

Visibility—

Dew point24°

Thu, 2271° / 47°

71 °

Altvan, Thursday, 22 October

Clear. High 71°, low 47°.

Pressure30.09 inHg

Wind7.6 mph W

Humidity16%

Visibility—

Dew point18°

Fri, 2368° / 50°

68 °

Altvan, Friday, 23 October

Clear. High 68°, low 50°.

Pressure30.12 inHg

Wind7.7 mph E

Humidity19%

Visibility—

Dew point21°

Sat, 2469° / 47°

69 °

Altvan, Saturday, 24 October

Clear. High 69°, low 47°.

Pressure30.03 inHg

Wind7.7 mph S

Humidity24%

Visibility—

Dew point24°

Sun, 2569° / 51°

69 °

Altvan, Sunday, 25 October

Clear. High 69°, low 51°.

Pressure29.94 inHg

Wind10.4 mph NW

Humidity21%

Visibility—

Dew point24°

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

Mon, 2655° / 34°

0.04

55 °

Altvan, Monday, 26 October

Climate normal for this date — 60-year average.

Average high55°

Average low34°

Average precipitation0.04 in

Chance of precipitation18%

Record high74° (1977)

Record low-4° (2020)

Tue, 2753° / 33°

0.02

53 °

Altvan, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high53°

Average low33°

Average precipitation0.02 in

Chance of precipitation17%

Record high74° (2016)

Record low4° (2020)

Wed, 2854° / 33°

0.07

54 °

Altvan, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high54°

Average low33°

Average precipitation0.07 in

Chance of precipitation27%

Record high72° (2024)

Record low8° (2019)

Thu, 2953° / 32°

0.06

53 °

Altvan, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high53°

Average low32°

Average precipitation0.06 in

Chance of precipitation25%

Record high74° (1968)

Record low-1° (2019)

Fri, 3049° / 31°

0.04

49 °

Altvan, Friday, 30 October

Climate normal for this date — 60-year average.

Average high49°

Average low31°

Average precipitation0.04 in

Chance of precipitation22%

Record high71° (1968)

Record low-2° (2019)

Sat, 3149° / 31°

0.04

49 °

Altvan, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high49°

Average low31°

Average precipitation0.04 in

Chance of precipitation33%

Record high69° (2008)

Record low3° (1991)

Sun, 0149° / 31°

0.05

49 °

Altvan, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high49°

Average low31°

Average precipitation0.05 in

Chance of precipitation28%

Record high68° (1988)

Record low6° (1991)

Mon, 0249° / 29°

0.05

49 °

Altvan, Monday, 2 November

Climate normal for this date — 60-year average.

Average high49°

Average low29°

Average precipitation0.05 in

Chance of precipitation22%

Record high70° (2025)

Record low-2° (1991)

Tue, 0349° / 29°

0.04

49 °

Altvan, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high49°

Average low29°

Average precipitation0.04 in

Chance of precipitation15%

Record high70° (2020)

Record low-2° (1967)

Wed, 0450° / 29°

0.02

50 °

Altvan, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high50°

Average low29°

Average precipitation0.02 in

Chance of precipitation10%

Record high67° (2020)

Record low2° (1967)

Thu, 0550° / 30°

0.02

50 °

Altvan, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high50°

Average low30°

Average precipitation0.02 in

Chance of precipitation17%

Record high69° (1975)

Record low-3° (1967)

Fri, 0650° / 31°

0.02

50 °

Altvan, Friday, 6 November

Climate normal for this date — 60-year average.

Average high50°

Average low31°

Average precipitation0.02 in

Chance of precipitation13%

Record high71° (2010)

Record low11° (1979)

Sat, 0751° / 31°

0.02

51 °

Altvan, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high51°

Average low31°

Average precipitation0.02 in

Chance of precipitation13%

Record high69° (1999)

Record low8° (1990)

Sun, 0849° / 30°

0.04

49 °

Altvan, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high49°

Average low30°

Average precipitation0.04 in

Chance of precipitation23%

Record high69° (1999)

Record low13° (2003)

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 Altvan, WY 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 Altvan, WY 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.