Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.
December, Low crowds, average high temperature 7 degrees Celsius, average low temperature 0 degrees Celsius. Partly sunny.
0°
4°
weather_cloudy
January, Moderate crowds, average high temperature 4 degrees Celsius, average low temperature -4 degrees Celsius. Cloudy most days.
-4°
6°
weather_partly_sunny
February, Low crowds, average high temperature 6 degrees Celsius, average low temperature -3 degrees Celsius. Partly sunny.
-3°
13°
weather_partly_sunny
March, High crowds, average high temperature 13 degrees Celsius, average low temperature 4 degrees Celsius. Partly sunny.
4°
19°
weather_sun
April, High crowds, average high temperature 19 degrees Celsius, average low temperature 8 degrees Celsius. Sunny most days.
8°
24°
weather_sun
May, High crowds, average high temperature 24 degrees Celsius, average low temperature 14 degrees Celsius. Sunny most days.
14°
30°
weather_sun
June, High crowds, average high temperature 30 degrees Celsius, average low temperature 20 degrees Celsius. Sunny most days.
20°
31°
weather_sun
July, Moderate crowds, average high temperature 31 degrees Celsius, average low temperature 21 degrees Celsius. Sunny most days.
21°
30°
weather_sun
August, Moderate crowds, average high temperature 30 degrees Celsius, average low temperature 20 degrees Celsius. Sunny most days.
20°
27°
weather_sun
September, Low crowds, average high temperature 27 degrees Celsius, average low temperature 17 degrees Celsius. Sunny most days.
17°
20°
weather_sun
October, Moderate crowds, average high temperature 20 degrees Celsius, average low temperature 10 degrees Celsius. Sunny most days.
10°
13°
weather_partly_sunny
November, Low crowds, average high temperature 13 degrees Celsius, average low temperature 4 degrees Celsius. Partly sunny.
4°
Monthly weather averages (˚C)
Top landmarks in Arnold
Arnold Historical Society & Museum
The center of Arnold is home to cultural attractions like Arnold Historical Society & Museum, so you might want to stop by during your stay. If you want to experience more of the culture Arnold has to offer, head to Mastodon State Historic Site, Kennedy Rink, and Barnes Jewish South Campus.
Discover the suburban charm of Arnold, where the Meramec and Mississippi rivers converge to create a peaceful retreat from St. Louis. Flamm City Park buzzes with picnickers and summer concerts under open skies. History buffs can't miss the Arnold Historical Society & Museum, which chronicles the area's fascinating past. Take a swing at Arnold Golf Club or hunt for treasures along Jeffco Boulevard's small-town shops. Just minutes away, Mastodon State Historic Site reveals prehistoric wonders, while Grant's Farm offers a glimpse into presidential history. The riverside location provides endless opportunities for fishing and boating when the weather cooperates.
Magnolia Hotel St. Louis, a Tribute Portfolio Hotel
10/10 Excellent
"Hotel decorated beautifully for Christmas. Room was clean and well appointed. The staff were very friendly and welcoming. The ooey gooey butter cookie offered at bedtime was delicious! Will definitely stay here again!"
If you want the flexibility to change your travel plans to Arnold, most hotels provide refundable* rates you can book. You can see these accommodations by searching our site and using the "fully refundable" filter to narrow down the results.
What will the weather in Arnold be like during my trip?
July and August are typically the warmest months in Arnold when the average temp is 76°F. January and February are the coldest months when the average temperature is 38°F. May and April are the months with the most rain.
Why should I book my Arnold hotel through Hotels.com?
There are lots of reasons to book your Arnold trip with us: our free cancellations on selected hotels gives you flexibility, and with One Key™, our rewards program, you will be able to earn and use OneKeyCash™* on all eligible bookings such as hotels, car rentals, flights, vacation rentals and more on Hotels.com, Expedia and Vrbo.