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: 38° | Low: 30°
Current Temperature
Partly Cloudy
Station: KUUV
Observed at: 10:15 pm CST on 11/12/26
Wind: 0 mph | Humidity: %
Tonight:Mostly clear, with a low around 30. Northwest wind 2 to 7 mph.
Friday:Sunny, with a high near 45. North wind 3 to 7 mph.
Friday Night:Clear, with a low around 23. North wind around 2 mph.
Advertisement

Today’s Report:

🥾 Hiking

Good
  79 /100

Good for hiking. High near 45°F. Light wind (7 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 85/100
Ideal conditions for hiking. Comfortable temperature (high near 49°F), light wind, and clear forecast.

⛺ Camping

Good
  83 /100

Good for camping. High near 45°F. Light wind (7 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 93/100
Ideal conditions for camping. Comfortable temperature (high near 49°F), light wind, and clear forecast.

🛶 Paddling

Not Recommended
  23 /100

Not Recommended for paddling. High near 45°F. Light wind (7 mph). Temperatures outside comfort limits (45°F).

  • Temp: Unfavorable weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Not Recommended 23/100
Not Recommended for paddling. High near 49°F. Temperatures outside comfort limits (49°F).

🐟 Fishing

Good
  82 /100

Good for fishing. High near 45°F. Light wind (7 mph).

  • Temp: Marginal weather factor
  • Rain: Favorable conditions
  • Wind: Favorable conditions
  • Thunderstorm: Favorable conditions
Tomorrow's Outlook:
Excellent 88/100
Ideal conditions for fishing. Comfortable temperature (high near 49°F), light wind, and clear forecast.

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: 38° | Low: 30°
Current Temperature
Partly Cloudy
Station: KUUV
Observed at: 10:15 pm CST on 11/12/26
Wind: 0 mph | Humidity: %
Fri ☀
45° 23°
0%
Sat ☀
49° 25°
0%
Sun ☀
53° 26°
1%
Mon ☀
55° 27°
0%
Tue ☀
59° 29°
0%
Wed ☀
63° 40°
0%
Thu 🌧
65° --°
15%

7-Day High Temperature Trend

45° Fri 49° Sat 53° Sun 55° Mon 59° Tue 63° Wed 65° Thu

7-Day Low Temperature Trend

23° Fri 25° Sat 26° Sun 27° Mon 29° Tue 40° Wed 50° Thu

📊 7-Day Outdoor Outlook

Good Fair Poor 20 Fri 20 Sat 85 Sun 100 Mon 100 Tue 100 Wed 100 Thu
Forecast data from the National Weather Service  |  Last Updated: November 12, 2026 10:52 pm CST

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.