Galena, IL weather in August
Expect warm, often humid weather with some rain in Galena in August, with highs near 83°F and lows near 61°F. Rain falls on about 10 days. It is one of the warmest months in Galena.
- Normal high
- 83°F
- Normal low
- 61°F
- Wet days
- 10
- 4.2 in total
- Muggy days
- 11
- dew point 65°F+
How August changes from start to finish
| August 1 | August 31 | |
|---|---|---|
| Normal high | 84°F | 81°F |
| Normal low | 63°F | 58°F |
| Chance of a wet day | 31% | 32% |
| Sunrise / sunset | 5:54 am / 8:21 pm | 6:25 am / 7:38 pm |
| Daylight | 14.5 h | 13.2 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Central Time).
A typical August day
- 6 am63°Fdew point 60°F
- 9 am71°Fdew point 63°F
- Noon76°Fdew point 62°F
- 3 pm78°Fdew point 62°F
- 6 pm75°Fdew point 63°F
- 9 pm68°Fdew point 62°F
NOAA hourly normals (local standard time) from Dubuque Rgnl Airport (14 mi away); average wind 7 mph.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F7 of 31
- Hot dayshigh 90°F or more4 of 31
- Muggy daysdaily mean dew point 65°F or more11 of 31
- Wet daysat least 0.01 in of rain or melted snow10 of 31
- Notable rainat least 0.10 in6 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per August, counted from daily records for each year 1991-2020.
Rain in August
Normal precipitation is 4.2 in; a dry August brings about 2.7 in and a wet one about 5.5 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How August varies from year to year
- Warmest August, 1991-20201995: average high 88°F
- Coolest August1992: average high 76°F
- Wettest August2002: 12.9 in
- Driest August2003: 0.2 in
- Highest reading102°F (August 10, 2001)
- Lowest reading43°F (August 31, 1992)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
August compared with July and September
| July | August | September | |
|---|---|---|---|
| Normal high | 85°F | 83°F | 76°F |
| Normal low | 63°F | 61°F | 52°F |
| Wet days | 9 | 10 | 9 |
| Comfortable days | 5 | 7 | 14 |
| Daylight | 14.9 h | 13.8 h | 12.5 h |
Highs change by -2°F from July and -7°F into September.
How Galena ranks in August
- Normal high259th warmest of 378 cities; 4th of 8 in Illinois
- Wet days244th driest of 378
- Comfortable days101st most of 341
What to pack for Galena in August
- A rain jacket or umbrella – rain on about 10 days
Heating and cooling
August has 10 heating degree days and 221 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Galena in August?
The normal high is 83°F and the normal low is 61°F. From 1991 to 2020 the hottest August reading was 102°F (August 10, 2001).
Does it rain a lot in Galena in August?
About 10 days in August have at least 0.01 in of precipitation, and the normal total is 4.2 in. The wettest August in 1991-2020 was in 2002 (12.9 in); the driest was in 2003 (0.2 in).
Is August a good time to visit Galena?
August ranks 5th of 12 months on our comfort score for Galena (59 out of 100). It has about 7 comfortable days and about 4 days at 90°F or hotter. The best month is May.
Where the numbers come from
- Temperature and frost dates: Bellevue L&D 12 (USC00130608), 11 mi S of the city center, 603 ft . NOAA normals and daily records, 1991-2020.
- Rain, snowfall and snow depth: Galena (USC00113312), 2.5 mi ESE of the city center, 822 ft (190 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Dubuque Rgnl Airport (USW00094908), 14 mi W of the city center, 1,056 ft (424 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Dubuque Regional Airport (725470-94908), 14 mi W of the city center, 1,040 ft (408 ft higher than the city). Hourly observations, 1991-2020.
- Not available for this location: cloud cover (no station close enough or similar enough in elevation).