Grand Island weather in August: Grand Island, Nebraska: normal highs, lows, rain and records for August
Grand Island in August has a normal high of 86°F and a normal low of 64°F, a daily mean of 75°F, falling from 87°F on the 1st to 84°F by the 31st. Measurable precipitation falls on 9 days in a normal August, 3.20 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 18°C, 81 mm of precipitation in August.
- NOAA stationGrand Island Central NE Regional Airport
- Station IDUSW00014935
- Location40.96°N 98.31°W
- Elevation1,840 ft (561 m)
- Population53,250
- Jan 36° 16°
- Feb 40° 19°
- Mar 53° 29°
- Apr 63° 39°
- May 73° 51°
- Jun 84° 61°
- Jul 88° 66°
- Aug 86° 64°
- Sep 79° 54°
- Oct 66° 41°
- Nov 51° 28°
- Dec 39° 19°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Grand Island in August?
The normal high is 86°F and the normal low 64°F, for a daily mean of 74.6°F. August is 2.4°F cooler than July and 8.0°F warmer than September. August is the 2nd warmest month of the year in Grand Island and the 4th wettest. Across the month the normal high falls 3°F, from 87°F on August 1 to 84°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 72°F and 77°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 30%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 87°F | 66°F | 30% | 19% |
| August 8 | 87°F | 65°F | 29% | 19% |
| August 15 | 86°F | 64°F | 28% | 18% |
| August 22 | 85°F | 62°F | 26% | 17% |
| August 31 | 84°F | 60°F | 25% | 15% |
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 | 87°F | 66°F | 30% | 19% | 14 h 20 min |
| August 2 | 87°F | 66°F | 29% | 19% | 14 h 20 min |
| August 3 | 87°F | 66°F | 29% | 19% | 14 h 20 min |
| August 4 | 87°F | 66°F | 29% | 19% | 14 h 20 min |
| August 5 | 87°F | 66°F | 29% | 19% | 14 h 10 min |
| August 6 | 87°F | 66°F | 29% | 19% | 14 h 10 min |
| August 7 | 87°F | 65°F | 29% | 19% | 14 h 10 min |
| August 8 | 87°F | 65°F | 29% | 19% | 14 h 10 min |
| August 9 | 87°F | 65°F | 29% | 19% | 14 h 10 min |
| August 10 | 87°F | 65°F | 29% | 19% | 14 h |
| August 11 | 86°F | 65°F | 29% | 19% | 14 h |
| August 12 | 86°F | 65°F | 28% | 19% | 14 h |
| August 13 | 86°F | 64°F | 28% | 18% | 14 h |
| August 14 | 86°F | 64°F | 28% | 18% | 13 h 50 min |
| August 15 | 86°F | 64°F | 28% | 18% | 13 h 50 min |
| August 16 | 86°F | 64°F | 28% | 18% | 13 h 50 min |
| August 17 | 86°F | 64°F | 27% | 18% | 13 h 50 min |
| August 18 | 86°F | 63°F | 27% | 18% | 13 h 40 min |
| August 19 | 86°F | 63°F | 27% | 17% | 13 h 40 min |
| August 20 | 85°F | 63°F | 27% | 17% | 13 h 40 min |
| August 21 | 85°F | 63°F | 26% | 17% | 13 h 40 min |
| August 22 | 85°F | 62°F | 26% | 17% | 13 h 30 min |
| August 23 | 85°F | 62°F | 26% | 17% | 13 h 30 min |
| August 24 | 85°F | 62°F | 26% | 16% | 13 h 30 min |
| August 25 | 85°F | 62°F | 26% | 16% | 13 h 30 min |
| August 26 | 85°F | 61°F | 25% | 16% | 13 h 20 min |
| August 27 | 85°F | 61°F | 25% | 16% | 13 h 20 min |
| August 28 | 84°F | 61°F | 25% | 16% | 13 h 20 min |
| August 29 | 84°F | 60°F | 25% | 16% | 13 h 20 min |
| August 30 | 84°F | 60°F | 25% | 16% | 13 h 10 min |
| August 31 | 84°F | 60°F | 25% | 15% | 13 h 10 min |
- Normal high
- 86°FAugust average
- Normal low
- 64°FAugust average
- Precipitation
- 3.20 inmonth total
- Days with precipitation
- 90.01 inch or more
- Days at 90°F or more
- 8
- Daylight
- 14 h 20 min to 13 h 10 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 24
- Sunshine
- 84%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014935; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Grand Island in August?
On a given August day the chance of 0.01 inch or more is 27% on average, highest around August 1 (30%). In all, 3.20 in falls on 9 days of a normal August, 1 of them with an inch or more.
In a normal August in Grand Island, 8 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014935.
How humid and windy is Grand Island in August?
At 3 p.m. the normal temperature is 82°F with 47% relative humidity and a dew point of 60°F; at 6 a.m. it is 63°F with 87% humidity. The wind averages 9.4 mph, most often from the south-southeast in the afternoon.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 63°F | 59°F | 87% | 7.3 mph | 70% |
| 9 a.m. | 71°F | 61°F | 70% | 10.1 mph | 72% |
| noon | 79°F | 61°F | 53% | 11.7 mph | 72% |
| 3 p.m. | 82°F | 60°F | 47% | 12.1 mph | 75% |
| 6 p.m. | 79°F | 61°F | 54% | 9.6 mph | 81% |
| 9 p.m. | 70°F | 61°F | 75% | 8.0 mph | 86% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014935. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for August in Grand Island?
The warmest August temperature on Grand Island's official record (since 1895) is 112°F, on August 8, 1934; the coldest is 38°F, on August 24, 1928. The wettest August brought 11.94 in (2019).
The August mean against the 1991-2020 normal of 74.6°F: 2021 76.3°F (+1.7), 2022 76.0°F (+1.4), 2023 76.8°F (+2.3), 2024 74.4°F (−0.2), 2025 74.0°F (−0.6), 2026 74.6°F (at normal). 3 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.3°F | +1.7°F | 4.53 in |
| 2022 | 76.0°F | +1.4°F | 0.45 in |
| 2023 | 76.8°F | +2.3°F | 1.44 in |
| 2024 | 74.4°F | −0.2°F | 2.08 in |
| 2025 | 74.0°F | −0.6°F | 1.04 in |
| 2026 | 74.6°F | at normal | 4.25 in |
Source: records: ACIS, NWS threaded record GRIthr; recent months: ACIS, station USW00014935. Records and recent months use complete months only.
How does August in Grand Island compare across Nebraska?
Across the 137 places PlainClimate covers in Nebraska, August normal highs run from 81°F in Oakdale to 90°F in Beaver City; Grand Island's is 86°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Grand Island in July88°F by day, 66°F at night
- Grand Island in September79°F by day, 54°F at night
- Grand Island through the yearEvery month, frost dates, records and recent years
- Nebraska in AugustThe statewide normal and the warmest and coolest places
- Beaver City: Nebraska's warmest Augustnormal high 90°F