Meramec & Onondaga Cave State Parks, MO

Home / Locations / Missouri / Meramec & Onondaga Cave State Parks, MO
The Meramec River flowing past a wooded gravel bank in the state-park corridor
The Meramec River flowing past a wooded gravel bank in the state-park corridor — Photo by Kbh3rd, CC BY-SA 3.0, via Wikimedia Commons.

Today’s Forecast:

🌤
°F
High: 74° | Low: 58°
Current Temperature
Station: KUUV
Observed at: 3:35 pm CDT on 9/25/26
Wind: 5 mph | Humidity: %
This Afternoon:Partly sunny, with a high near 74. Northeast wind around 6 mph.
Tonight:Mostly cloudy, with a low around 58. East wind around 5 mph.
Saturday:Mostly cloudy, with a high near 72. East wind 1 to 5 mph.
Featured Download

🧐 Adventure Bingo Game

Download the outdoor adventure Bingo game to keep kids engaged in the outdoors.

Today’s Report:

🥾 Hiking

Excellent
  100 /100

Excellent for hiking. High near 73°F. Low rain risk (2%). Light wind (6 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Excellent for hiking. High near 72°F. Low rain risk (10%).

⛺ Camping

Excellent
  100 /100

Excellent for camping. High near 73°F. Low rain risk (2%). Light wind (6 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Excellent for camping. High near 72°F. Low rain risk (10%).

🛶 Paddling

Excellent
  100 /100

Excellent for paddling. High near 73°F. Low rain risk (2%). Light wind (6 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Excellent for paddling. High near 72°F. Low rain risk (10%).

🐟 Fishing

Excellent
  100 /100

Excellent for fishing. High near 73°F. Low rain risk (2%). Light wind (6 mph).

  • Temp: Favorable conditions
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 100/100
Excellent for fishing. High near 72°F. Low rain risk (10%).

About Meramec & Onondaga Cave State Parks

Meramec state park’s franklin county visitor core plus onondaga cave and vilander bluff in crawford county create different weather decisions within one practical trip.

Planning an Outing

Begin with Meramec flooding, cave-tour closure, slick entrances, launch, campground and bluff access. Check the exact facility notice before committing to this Meramec State Park’s Franklin County visitor core plus Onondaga Cave and Vilander Bluff in Crawford County.

Destination-Specific Access

Fisher Cave is the representative land point; Washington County is excluded because no substantial named facility requires it.

Weather Tips

  • Before camping at Meramec State Park’s Franklin County visitor core plus Onondaga Cave and Vilander Bluff in Crawford County, confirm loops, water service and gate hours with the managing agency.

Nearby Towns and Areas

  • Fisher Cave
  • Meramec State Park
  • Onondaga Cave
  • Vilander Bluff
  • Meramec River

Adjust the Day to the Forecast

Move to shore or a short protected trail when wind, waves, flow or access is unsuitable; otherwise, delay campsite setup until warned wind or lightning passes.

7-Day Forecast

🌤
°F
High: 74° | Low: 58°
Current Temperature
Station: KUUV
Observed at: 3:35 pm CDT on 9/25/26
Wind: 5 mph | Humidity: %
Fri ⛅
74° 58°
2%
Sat ☁
72° 57°
10%
Sun ⛅
75° 58°
14%
Mon ⛅
77° 58°
9%
Tue 🌧
80° 65°
25%
Wed ⛈
78° 64°
52%
Thu ⛈
76° 62°
50%

7-Day High Temperature Trend

74° Fri 72° Sat 75° Sun 77° Mon 80° Tue 78° Wed 76° Thu

7-Day Low Temperature Trend

58° Fri 57° Sat 58° Sun 58° Mon 65° Tue 64° Wed 62° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 100 Fri 100 Sat 100 Sun 85 Mon 70 Tue 16 Wed 19 Thu
Forecast data from the National Weather Service  |  Last Updated: September 25, 2026 4:13 pm CDT

Weather by Season

Winter

Freezing rain and rapid thaw can complicate campground and bluff access; verify the operating surface before committing to a full day.

Spring

Warm, humid air can arrive ahead of severe storms, making cave-tour closure the deciding factor for a spring outing.

Summer

Thunderstorms can change Meramec flooding faster than the daily temperature suggests; leave exposed terrain at the first warning.

Fall

Dry spells may improve surfaces until a cold front renews slick entrances; carry layers and preserve an early turnaround option.

Key Climate Data Points

  • Local climate: This local planning area has an annual average temperature near 56–59°F, receives about 42–48 inches of precipitation and records typically 8–16 inches.
  • Wettest season: Spring.
  • Driest season: Late summer or early fall.
  • Annual average temperature: Near 56–59°f.
  • Annual snowfall: Typically 8–16 inches.