Lake Geneva weather in August: Lake Geneva, Wisconsin: normal highs, lows, rain and records for August
Lake Geneva in August has a normal high of 83°F and a normal low of 61°F, a daily mean of 72°F, falling from 85°F on the 1st to 82°F by the 31st. Measurable precipitation falls on 10 days in a normal August, 3.32 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 16°C, 84 mm of precipitation in August.
- NOAA stationLake Geneva Wastewater Treatment Plant
- Station IDUSC00474457
- Location42.60°N 88.43°W
- Elevation846 ft (258 m)
- Population8,691
- Jan 30° 15°
- Feb 35° 17°
- Mar 45° 26°
- Apr 59° 37°
- May 72° 48°
- Jun 81° 58°
- Jul 86° 63°
- Aug 83° 61°
- Sep 76° 54°
- Oct 63° 42°
- Nov 47° 31°
- Dec 35° 21°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Lake Geneva in August?
The normal high is 83°F and the normal low 61°F, for a daily mean of 72.3°F. August is 2.0°F cooler than July and 7.2°F warmer than September. August is the 2nd warmest month of the year in Lake Geneva and the 6th wettest. Across the month the normal high falls 3°F, from 85°F on August 1 to 82°F on August 31. From one year to the next August's mean temperature typically moves about 2.3°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 70°F and 75°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 31%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 85°F | 63°F | 31% | 19% |
| August 8 | 84°F | 62°F | 31% | 19% |
| August 15 | 84°F | 62°F | 31% | 19% |
| August 22 | 83°F | 61°F | 31% | 19% |
| August 31 | 82°F | 59°F | 31% | 19% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 85°F | 63°F | 31% | 19% | 14 h 30 min |
| August 2 | 85°F | 63°F | 31% | 19% | 14 h 30 min |
| August 3 | 85°F | 63°F | 31% | 20% | 14 h 30 min |
| August 4 | 85°F | 63°F | 31% | 20% | 14 h 20 min |
| August 5 | 84°F | 62°F | 31% | 20% | 14 h 20 min |
| August 6 | 84°F | 62°F | 31% | 20% | 14 h 20 min |
| August 7 | 84°F | 62°F | 31% | 20% | 14 h 20 min |
| August 8 | 84°F | 62°F | 31% | 19% | 14 h 20 min |
| August 9 | 84°F | 62°F | 31% | 19% | 14 h 10 min |
| August 10 | 84°F | 62°F | 31% | 19% | 14 h 10 min |
| August 11 | 84°F | 62°F | 31% | 19% | 14 h 10 min |
| August 12 | 84°F | 62°F | 31% | 19% | 14 h 10 min |
| August 13 | 84°F | 62°F | 31% | 19% | 14 h |
| August 14 | 84°F | 62°F | 31% | 19% | 14 h |
| August 15 | 84°F | 62°F | 31% | 19% | 14 h |
| August 16 | 84°F | 62°F | 31% | 19% | 14 h |
| August 17 | 84°F | 61°F | 31% | 19% | 13 h 50 min |
| August 18 | 83°F | 61°F | 31% | 19% | 13 h 50 min |
| August 19 | 83°F | 61°F | 31% | 19% | 13 h 50 min |
| August 20 | 83°F | 61°F | 31% | 19% | 13 h 50 min |
| August 21 | 83°F | 61°F | 31% | 19% | 13 h 40 min |
| August 22 | 83°F | 61°F | 31% | 19% | 13 h 40 min |
| August 23 | 83°F | 61°F | 31% | 19% | 13 h 40 min |
| August 24 | 83°F | 61°F | 31% | 19% | 13 h 30 min |
| August 25 | 83°F | 60°F | 31% | 19% | 13 h 30 min |
| August 26 | 82°F | 60°F | 31% | 19% | 13 h 30 min |
| August 27 | 82°F | 60°F | 31% | 19% | 13 h 30 min |
| August 28 | 82°F | 60°F | 31% | 19% | 13 h 20 min |
| August 29 | 82°F | 60°F | 31% | 19% | 13 h 20 min |
| August 30 | 82°F | 59°F | 31% | 19% | 13 h 20 min |
| August 31 | 82°F | 59°F | 31% | 19% | 13 h 20 min |
- Normal high
- 83°FAugust average
- Normal low
- 61°FAugust average
- Precipitation
- 3.32 inmonth total
- Days with precipitation
- 100.01 inch or more
- Days at 90°F or more
- 5
- Daylight
- 14 h 30 min to 13 h 20 minAugust 1 to August 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 23
- Sunshine
- 79%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00474457; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Lake Geneva in August?
On a given August day the chance of 0.01 inch or more is 31% on average, highest around August 8 (31%). In all, 3.32 in falls on 10 days of a normal August, 1 of them with an inch or more.
In a normal August in Lake Geneva, 5 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00474457.
What are the records for August in Lake Geneva?
The warmest August temperature on this station's record (since 1945) is 106°F, on August 1, 1988; the coldest is 40°F, on August 29, 1965. The wettest August brought 11.30 in (1979).
The August mean against the 1991-2020 normal of 72.3°F: 2023 70.3°F (−2.0), 2024 70.2°F (−2.1), 2025 68.9°F (−3.4), 2026 70.2°F (−2.1). 0 of 4 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 70.3°F | −2.0°F | 2.47 in |
| 2024 | 70.2°F | −2.1°F | 3.73 in |
| 2025 | 68.9°F | −3.4°F | 3.46 in |
| 2026 | 70.2°F | −2.1°F | 6.12 in |
Source: records: ACIS, station USC00474457; recent months: ACIS, station USC00474457. Records and recent months use complete months only.
How does August in Lake Geneva compare across Wisconsin?
Across the 165 places PlainClimate covers in Wisconsin, August normal highs run from 71°F in Laona to 83°F in Lake Geneva; Lake Geneva's is 83°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.