As of 02:53 CDT

Weather in Sibley, IA

63°

Sibley, Sunday, 9 August, 02:53

Overcast. Feels like 63°. High 82°, low 63°.

Pressure29.85 inHg

Wind7.4 mph SE

Humidity92%

Visibility6.2 mi

Dew point60°

See detailed hourly forecast

Monthly outlook for Sibley, IA: average high 84.9°, average low 63.8°. That is 3.5° above the climate normal for August. Precipitation is expected on 8 days (about 1.3 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 22 August (97.9°), the coolest 14 August (56.3°).

84.9°/63.8°

Average high / low

+3.5°

Above normal

8 / 5

Wet days / normal

1.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	82.6°	78.5°	+2.3°
19 August – 28 August	88.6°	78.8°	+5.5°
29 August – 7 September	at normal	77.2°	—

August records over 66 years

98.1°16 August 1983All-time high

42.6°28 August 1986All-time low

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

Mon, 1083° / 61°

0.35

83 °

Sibley, Monday, 10 August

Heavy rain. High 83°, low 61°.

Pressure29.88 inHg

Wind6.1 mph SE

Humidity70%

Visibility6.2 mi

Dew point65°

Tue, 1191° / 67°

0.03

91 °

Sibley, Tuesday, 11 August

Light rain. High 91°, low 67°.

Pressure29.80 inHg

Wind11.5 mph NE

Humidity54%

Visibility6.2 mi

Dew point67°

Wed, 1289° / 60°

0.07

89 °

Sibley, Wednesday, 12 August

Light rain. High 89°, low 60°.

Pressure29.88 inHg

Wind11.2 mph E

Humidity32%

Visibility6.2 mi

Dew point51°

Thu, 1367° / 60°

0.29

67 °

Sibley, Thursday, 13 August

Rain. High 67°, low 60°.

Pressure30.06 inHg

Wind9.4 mph SE

Humidity96%

Visibility—

Dew point59°

Fri, 1472° / 56°

72 °

Sibley, Friday, 14 August

Overcast. High 72°, low 56°.

Pressure30.12 inHg

Wind13.6 mph SE

Humidity47%

Visibility—

Dew point48°

Sat, 1569° / 62°

69 °

Sibley, Saturday, 15 August

Light rain. High 69°, low 62°.

Pressure30.15 inHg

Wind10.9 mph SE

Humidity86%

Visibility—

Dew point60°

Sun, 1690° / 64°

90 °

Sibley, Sunday, 16 August

Overcast. High 90°, low 64°.

Pressure30.09 inHg

Wind7.6 mph N

Humidity38%

Visibility—

Dew point54°

Mon, 1788° / 62°

88 °

Sibley, Monday, 17 August

Mostly clear. High 88°, low 62°.

Pressure30.03 inHg

Wind13.3 mph S

Humidity37%

Visibility—

Dew point53°

Tue, 1896° / 66°

0.03

96 °

Sibley, Tuesday, 18 August

Light rain. High 96°, low 66°.

Pressure29.80 inHg

Wind14.5 mph S

Humidity46%

Visibility—

Dew point64°

Wed, 1996° / 72°

0.02

96 °

Sibley, Wednesday, 19 August

Light rain. High 96°, low 72°.

Pressure29.77 inHg

Wind9.9 mph S

Humidity36%

Visibility—

Dew point62°

Thu, 2094° / 66°

0.07

94 °

Sibley, Thursday, 20 August

Light rain. High 94°, low 66°.

Pressure29.85 inHg

Wind13.4 mph NE

Humidity34%

Visibility—

Dew point58°

Fri, 2183° / 62°

0.04

83 °

Sibley, Friday, 21 August

Light rain. High 83°, low 62°.

Pressure29.91 inHg

Wind10.1 mph E

Humidity41%

Visibility—

Dew point54°

Sat, 2298° / 67°

0.09

98 °

Sibley, Saturday, 22 August

Light rain. High 98°, low 67°.

Pressure29.71 inHg

Wind14.1 mph E

Humidity44%

Visibility—

Dew point63°

Sun, 2384° / 66°

0.07

84 °

Sibley, Sunday, 23 August

Light rain. High 84°, low 66°.

Pressure29.91 inHg

Wind14.6 mph NE

Humidity88%

Visibility—

Dew point69°

Mon, 2477° / 68°

0.2

77 °

Sibley, Monday, 24 August

Rain. High 77°, low 68°.

Pressure30.00 inHg

Wind11.6 mph NE

Humidity92%

Visibility—

Dew point69°

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

Tue, 2579° / 62°

0.12

79 °

Sibley, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.12 in

Chance of precipitation28%

Record high93° (2020)

Record low48° (1964)

Wed, 2679° / 63°

0.14

79 °

Sibley, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.14 in

Chance of precipitation32%

Record high92° (1976)

Record low49° (2015)

Thu, 2778° / 62°

0.11

78 °

Sibley, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.11 in

Chance of precipitation35%

Record high93° (1984)

Record low47° (1967)

Fri, 2878° / 62°

0.13

78 °

Sibley, Friday, 28 August

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.13 in

Chance of precipitation37%

Record high97° (1984)

Record low43° (1986)

Sat, 2979° / 61°

0.06

79 °

Sibley, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high79°

Average low61°

Average precipitation0.06 in

Chance of precipitation17%

Record high95° (2012)

Record low47° (1988)

Sun, 3078° / 61°

0.11

78 °

Sibley, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high78°

Average low61°

Average precipitation0.11 in

Chance of precipitation32%

Record high98° (2012)

Record low46° (2009)

Mon, 3177° / 60°

0.13

77 °

Sibley, Monday, 31 August

Climate normal for this date — 60-year average.

Average high77°

Average low60°

Average precipitation0.13 in

Chance of precipitation25%

Record high88° (2013)

Record low45° (1992)

Tue, 0177° / 60°

0.08

77 °

Sibley, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high77°

Average low60°

Average precipitation0.08 in

Chance of precipitation25%

Record high90° (2011)

Record low44° (1974)

Wed, 0277° / 60°

0.1

77 °

Sibley, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high77°

Average low60°

Average precipitation0.1 in

Chance of precipitation35%

Record high92° (2023)

Record low48° (1972)

Thu, 0377° / 60°

0.09

77 °

Sibley, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high77°

Average low60°

Average precipitation0.09 in

Chance of precipitation25%

Record high91° (2023)

Record low37° (1974)

Fri, 0477° / 59°

0.11

77 °

Sibley, Friday, 4 September

Climate normal for this date — 60-year average.

Average high77°

Average low59°

Average precipitation0.11 in

Chance of precipitation22%

Record high94° (2012)

Record low44° (2025)

Sat, 0576° / 60°

0.07

76 °

Sibley, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high76°

Average low60°

Average precipitation0.07 in

Chance of precipitation25%

Record high89° (1990)

Record low39° (1962)

Sun, 0678° / 59°

0.05

78 °

Sibley, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high78°

Average low59°

Average precipitation0.05 in

Chance of precipitation13%

Record high97° (1976)

Record low41° (2025)

Mon, 0776° / 58°

0.1

76 °

Sibley, Monday, 7 September

Climate normal for this date — 60-year average.

Average high76°

Average low58°

Average precipitation0.1 in

Chance of precipitation33%

Record high93° (1978)

Record low41° (1986)

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 Sibley, IA 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 Sibley, IA 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.