Early autumn · Weather & things to do
Lake Hefner in September
Lake Hefner cools off: highs slip to 85°F (29°C), from 93°F in August, with lows of 63°F (17°C) and about 3.0 in (77 mm) of rain.
It scores 83/100 for comfort, 5th of 12, which makes it a solid shoulder-season month.
- Avg high
- 85°F (29°C)
- Avg low
- 63°F (17°C)
- Rain
- 3.0 in (77 mm)
- Humidity
- 64%
- Cloud cover
- 38%
- Daylight
- ~12 h 13 min
- Comfort score
- 83/100 · Great
What September feels like
Warm afternoons near 85°F (29°C) make long days outdoors easy.
There's a big swing between day and night, about 12°C (22°F), so mornings and evenings feel much cooler than the afternoon.
Showers are part of the month, adding up to about 3.0 in (77 mm).
Plan around September
September is shoulder season: good weather, a step below the best months (March & April and October & November).
- Comfort improves from 63/100 in August to 83/100.
- Our Oklahoma City New Year's Eve route is planned for Dec 30 – Jan 1, a window set by the holiday season rather than the weather — September falls outside it.
What to pack for September
- Light, breathable clotheshighs average 85°F
- Sunscreen, sunglasses and a hatstrong sun this month
- A warm layer for eveningslows near 63°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Lake Hefner in September
September is good outdoor weather here, so these picks lean toward the open air.
Louie's Grill & Bar
Casual lakeside bar and grill next to the lighthouse, known for burgers and a deck facing the lake.
Why now September scores 83/100 for comfort, good conditions for being outside.
Martin Park Nature Center
City nature preserve with short wooded trails along a creek and a small nature center.
Why now Highs near 85°F and 3.0 in of monthly rain make this an easy outdoor pick.
Lake Hefner Lighthouse
The small lighthouse at the end of the East Wharf jetty, the lake's landmark and its sunset spot.
Why now One to do outside while the weather is on your side.
Stars and Stripes Park
Lakeside park on Hefner's south shore with open lawns, picnic shelters and a stretch of the shoreline trail.
Nearby in September
- Oklahoma City in September~8 mi · highs 85°F, 3.0 in rain · similar daytime temperatures, about as wet
- Wichita Mountains in September~85 mi · highs 85°F, 3.0 in rain · similar daytime temperatures, about as wet
- Tulsa in September~98 mi · highs 86°F, 3.4 in rain · similar daytime temperatures, about as wet
- Dallas in September~198 mi · highs 90°F, 3.0 in rain · 3°C (5°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Lake Hefner in September: quick answers
Is September a good time to visit Lake Hefner?
It's a good shoulder-season choice, scoring 83/100 against a best of 92 in March & April and October & November. Expect highs of 85°F (29°C) and 3.0 in (77 mm) of rain.
How hot is Lake Hefner in September?
Average highs are 85°F (29°C) and average lows 63°F (17°C), making it the 4th-warmest month by daytime highs.
Does it rain a lot in Lake Hefner in September?
Some: about 3.0 in (77 mm) of rain falls across September on average, the 6th-driest month of the year. The annual total is about 34.6 in (878 mm).
What should I pack for Lake Hefner in September?
Bring light, breathable clothes (highs average 85°F), sunscreen, sunglasses and a hat (strong sun this month), a warm layer for evenings (lows near 63°F), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Lake Hefner
Planning Lake Hefner in September?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.