As of 09:25 CDT

Weather in Thornburg, IA

74°Current weather

Thornburg, Sunday, 9 August, 09:25

Overcast. Feels like 75°. High 97°, low 68°.

Pressure29.88 inHg
Wind12.3 mph S
Humidity90%
Visibility6.2 mi
Dew point70°

Monthly outlook for Thornburg, IA: average high 85.4°, average low 64.7°. That is 2° above the climate normal for August. Precipitation is expected on 3 days (about 1.6 inches), against a normal of 5 days and 1.9 inches. The warmest day looks like 11 August (100.8°), the coolest 23 August (59.5°).

85.4°/64.7°
Average high / low
+2°
Above normal
3 / 5
Wet days / normal
1.6 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
9 August – 18 August84.7°81.8°+1.6°
19 August – 28 August86.4°81.9°+2.5°
29 August – 7 Septemberat normal80.1°

August records over 66 years

101.8°16 August 1988All-time high
45°28 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Rose Hill (11 mi).

Mon, 1093° / 72°0Light rain
93 °Light rain

Thornburg, Monday, 10 August

Light rain. High 93°, low 72°.

Pressure29.85 inHg
Wind1.7 mph S
Humidity51%
Visibility6.2 mi
Dew point67°
Tue, 11101° / 70°0.01Light rain
101 °Light rain

Thornburg, Tuesday, 11 August

Light rain. High 101°, low 70°.

Pressure29.74 inHg
Wind13.5 mph SW
Humidity37%
Visibility6.2 mi
Dew point64°
Wed, 1288° / 69°0.01Light rain
88 °Light rain

Thornburg, Wednesday, 12 August

Light rain. High 88°, low 69°.

Pressure29.85 inHg
Wind10 mph E
Humidity59%
Visibility6.2 mi
Dew point70°
Thu, 1370° / 65°0.44Rain
70 °Rain

Thornburg, Thursday, 13 August

Rain. High 70°, low 65°.

Pressure29.91 inHg
Wind15.8 mph E
Humidity97%
Visibility
Dew point69°
Fri, 1472° / 63°0.48Rain
72 °Rain

Thornburg, Friday, 14 August

Rain. High 72°, low 63°.

Pressure30.06 inHg
Wind17.2 mph E
Humidity87%
Visibility
Dew point65°
Sat, 1581° / 64°0.54Rain
81 °Rain

Thornburg, Saturday, 15 August

Rain. High 81°, low 64°.

Pressure30.09 inHg
Wind13.1 mph E
Humidity89%
Visibility
Dew point68°
Sun, 1680° / 64°0.03Light rain
80 °Light rain

Thornburg, Sunday, 16 August

Light rain. High 80°, low 64°.

Pressure30.09 inHg
Wind13.5 mph NW
Humidity62%
Visibility
Dew point63°
Mon, 1780° / 61°0Overcast
80 °Overcast

Thornburg, Monday, 17 August

Overcast. High 80°, low 61°.

Pressure30.12 inHg
Wind7.1 mph SE
Humidity57%
Visibility
Dew point60°
Tue, 1886° / 62°0.02Light rain
86 °Light rain

Thornburg, Tuesday, 18 August

Light rain. High 86°, low 62°.

Pressure29.80 inHg
Wind9.6 mph S
Humidity61%
Visibility
Dew point65°
Wed, 1981° / 65°0Partly cloudy
81 °Partly cloudy

Thornburg, Wednesday, 19 August

Partly cloudy. High 81°, low 65°.

Pressure29.91 inHg
Wind15.4 mph NW
Humidity50%
Visibility
Dew point57°
Thu, 2084° / 61°0Clear
84 °Clear

Thornburg, Thursday, 20 August

Clear. High 84°, low 61°.

Pressure29.94 inHg
Wind7.6 mph NW
Humidity45%
Visibility
Dew point56°
Fri, 2193° / 62°0.04Light rain
93 °Light rain

Thornburg, Friday, 21 August

Light rain. High 93°, low 62°.

Pressure29.71 inHg
Wind13.5 mph S
Humidity43%
Visibility
Dew point61°
Sat, 2285° / 68°0Mostly clear
85 °Mostly clear

Thornburg, Saturday, 22 August

Mostly clear. High 85°, low 68°.

Pressure29.88 inHg
Wind17.3 mph N
Humidity32%
Visibility
Dew point50°
Sun, 2386° / 60°0Clear
86 °Clear

Thornburg, Sunday, 23 August

Clear. High 86°, low 60°.

Pressure30.15 inHg
Wind7.6 mph SE
Humidity39%
Visibility
Dew point52°
Mon, 2490° / 61°0Clear
90 °Clear

Thornburg, Monday, 24 August

Clear. High 90°, low 61°.

Pressure30.15 inHg
Wind12.6 mph SE
Humidity35%
Visibility
Dew point52°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2582° / 65°0.17Climate normal
82 °Climate normal

Thornburg, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.17 in
Chance of precipitation35%
Record high98° (2003)
Record low52° (1966)
Wed, 2682° / 65°0.22Climate normal
82 °Climate normal

Thornburg, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.22 in
Chance of precipitation35%
Record high96° (1983)
Record low50° (2025)
Thu, 2782° / 66°0.12Climate normal
82 °Climate normal

Thornburg, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high82°
Average low66°
Average precipitation0.12 in
Chance of precipitation30%
Record high96° (2013)
Record low54° (1967)
Fri, 2882° / 65°0.13Climate normal
82 °Climate normal

Thornburg, Friday, 28 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.13 in
Chance of precipitation33%
Record high98° (1984)
Record low45° (1986)
Sat, 2982° / 65°0.07Climate normal
82 °Climate normal

Thornburg, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high82°
Average low65°
Average precipitation0.07 in
Chance of precipitation28%
Record high96° (1984)
Record low49° (1986)
Sun, 3081° / 64°0.11Climate normal
81 °Climate normal

Thornburg, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.11 in
Chance of precipitation28%
Record high99° (2013)
Record low50° (2009)
Mon, 3180° / 63°0.12Climate normal
80 °Climate normal

Thornburg, Monday, 31 August

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.12 in
Chance of precipitation25%
Record high96° (2000)
Record low46° (2009)
Tue, 0180° / 64°0.11Climate normal
80 °Climate normal

Thornburg, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high80°
Average low64°
Average precipitation0.11 in
Chance of precipitation30%
Record high96° (1984)
Record low46° (1967)
Wed, 0281° / 64°0.09Climate normal
81 °Climate normal

Thornburg, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high81°
Average low64°
Average precipitation0.09 in
Chance of precipitation28%
Record high95° (2000)
Record low51° (1967)
Thu, 0380° / 63°0.07Climate normal
80 °Climate normal

Thornburg, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high80°
Average low63°
Average precipitation0.07 in
Chance of precipitation25%
Record high94° (1960)
Record low44° (1974)
Fri, 0479° / 62°0.07Climate normal
79 °Climate normal

Thornburg, Friday, 4 September

Climate normal for this date — 60-year average.

Average high79°
Average low62°
Average precipitation0.07 in
Chance of precipitation20%
Record high95° (1960)
Record low42° (1974)
Sat, 0580° / 62°0.07Climate normal
80 °Climate normal

Thornburg, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high80°
Average low62°
Average precipitation0.07 in
Chance of precipitation18%
Record high95° (1960)
Record low45° (1962)
Sun, 0679° / 62°0.11Climate normal
79 °Climate normal

Thornburg, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high79°
Average low62°
Average precipitation0.11 in
Chance of precipitation30%
Record high95° (1960)
Record low46° (1962)
Mon, 0779° / 62°0.19Climate normal
79 °Climate normal

Thornburg, Monday, 7 September

Climate normal for this date — 60-year average.

Average high79°
Average low62°
Average precipitation0.19 in
Chance of precipitation30%
Record high94° (2013)
Record low45° (2025)

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 Thornburg, 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 Thornburg, 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.