Weather in Oklahoma City in August

A hard month. August is a hard month in Oklahoma City, and worth planning around. Daytime highs average 34 °C and the afternoon is not negotiable — outdoor plans move to early morning or evening.

August ranks 11 of 12 — near the bottom of Oklahoma City's year. April is the month that works, and the swing between the two is 36 points, which is a different holiday rather than a slightly better one.

Rain on 10 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for heat management rather than style: shade, water, and a schedule that gives up on the middle of the day.

What the averages hide

Averages flatten a month, and this one hides a few things: 12 days clear 35 °C, so a serious heatwave is normal rather than notable. Across the twenty years measured, the hottest August day reached 46.6 °C and the coldest night fell to 12.8 °C, and the wettest single day dropped 68 mm — roughly 72% of the month's rain in one day.

August is moderately variable: 24 mm in the driest year against 175 mm in the wettest, around an average of 94 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 9.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 61%.

How August sits in the year

Temperatures hold steady either side: 34.7 °C in July, 34 here, 29.7 in September. Nothing about the timing within the month matters much.

Daylight in August

13.5 hours of daylight, losing 1 hours across the month. That is between Oklahoma City's extremes of 14.5 and 9.8 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 37 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Oklahoma City versus nearby

If Oklahoma City is one option among several, the nearby comparison is worth making. Tulsa is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Wichita is close enough to be a coin toss — within a degree on temperature, 2 days more rain.

So: August is a compromise. April is 35 points better and is what Oklahoma City is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Oklahoma City

See all twelve months in Oklahoma City, or where else to go in August.