Gateway Arch National Park Weather Forecast
Gateway Arch National Park weather: 71°F, mainly clear. Hourly forecast, 14-day outlook, UV, air quality and the best time to visit.
Summary
Gateway Arch National Park is a national park in Missouri. Gateway Arch National Park is a US national park known for the 630 foot stainless steel arch.
Right now it is 71°F (22°C) in Gateway Arch National Park with mainly clear. It feels like 75°F. Today runs from 58°F to 84°F. Chance of precipitation is 21%. Sightseeing conditions score 9.3/10 - excellent - go now.
The best time to visit Gateway Arch National Park is August, September and October. The climate is continental. January, February and December tend to be the least comfortable months. July is the warmest month with average highs near 88°F, while January is the coldest with lows near 22°F.
The closest major airport is Nashville International Airport (BNA), about 259 mi away. Nearby highlights include Starved Rock State Park and Mammoth Cave National Park.
In plain terms. Today is about average for August. The forecast high of 84°F is in line with the 86°F typical for this month. The best window to be outside is roughly 7 AM to 10 AM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in Gateway Arch National Park today at 9.3/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Active alerts for Gateway Arch National Park
Derived from the forecast. No official alert feed is wired for this country yet.
Weather in Gateway Arch National Park right now
Source: Open-Meteo. Updated 1:08 AM, Aug 25 local time.
Next 24 hours
Hour-by-hour temperature, precipitation chance and wind.
16-day forecast for Gateway Arch National Park
Daily highs and lows, precipitation and UV.
| Day | Conditions | High / Low | Precip | Wind | UV |
|---|---|---|---|---|---|
| Mon, Aug 24 | 🌦️ Light drizzle | 84° / 58° | 21% · 0,0 in | 7 mph | 7 |
| Tue, Aug 25 | ☁️ Overcast | 89° / 67° | 2% | 6 mph | 7 |
| Wed, Aug 26 | 🌦️ Drizzle | 91° / 72° | 11% · 0,0 in | 7 mph | 7 |
| Thu, Aug 27 | 🌦️ Light drizzle | 92° / 69° | 11% · 0,0 in | 9 mph | 7 |
| Fri, Aug 28 | ☁️ Overcast | 90° / 71° | 1% | 9 mph | 7 |
| Sat, Aug 29 | ☁️ Overcast | 91° / 68° | 1% | 9 mph | 7 |
| Sun, Aug 30 | ☁️ Overcast | 102° / 73° | 3% | 13 mph | 7 |
| Mon, Aug 31 | ☁️ Overcast | 103° / 80° | 10% | 12 mph | 7 |
| Tue, Sep 1 | ⛅ Partly cloudy | 106° / 78° | 14% | 10 mph | 7 |
| Wed, Sep 2 | ⛅ Partly cloudy | 106° / 85° | 15% | 11 mph | 7 |
| Thu, Sep 3 | 🌦️ Light drizzle | 107° / 74° | 19% · 0,1 in | 14 mph | 7 |
| Fri, Sep 4 | 🌦️ Light showers | 96° / 73° | 16% · 0,3 in | 11 mph | 7 |
| Sat, Sep 5 | 🌦️ Light drizzle | 96° / 72° | 17% · 0,1 in | 8 mph | 7 |
| Sun, Sep 6 | 🌦️ Drizzle | 94° / 75° | 23% · 0,1 in | 7 mph | 7 |
| Mon, Sep 7 | ☁️ Overcast | 88° / 70° | 16% | 9 mph | 7 |
| Tue, Sep 8 | 🌦️ Light drizzle | 89° / 65° | 23% · 0,0 in | 8 mph | 6 |
Climate in Gateway Arch National Park month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 36° | 22° | 2,9 in | ★★☆☆☆ |
| February | 49° | 30° | 1,4 in | ★★★☆☆ |
| March | 63° | 42° | 4,1 in | ★★★☆☆ |
| April | 69° | 51° | 7,1 in | ★★★☆☆ |
| May | 76° | 58° | 6,0 in | ★★★★☆ |
| June | 86° | 68° | 5,9 in | ★★★★☆ |
| July | 88° | 72° | 5,4 in | ★★★★☆ |
| August | 86° | 69° | 1,9 in | ★★★★☆ |
| September | 82° | 63° | 2,8 in | ★★★★☆ |
| October | 71° | 52° | 1,9 in | ★★★★☆ |
| November | 56° | 40° | 3,3 in | ★★★☆☆ |
| December | 47° | 32° | 2,4 in | ★★★☆☆ |
Climate type: Continental. Source: Open-Meteo archive (ERA5).
Weather map for Gateway Arch National Park
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Air quality and pollen in Gateway Arch National Park
Air quality: Open-Meteo (CAMS). US AQI scale.
Sun, twilight and moon
Golden and blue hour are the standard photographic approximation around sunrise and sunset.
Best time to visit Gateway Arch National Park
Go in August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
Explore Gateway Arch National Park
Every topic we hold for this place, and the same topic for the places around it.
Weather for related places
Frequently asked questions
Where is Gateway Arch National Park?
Gateway Arch National Park is a national park in Missouri. Its coordinates are 38.6247, -90.1848. It lies in North America.
What is the weather like in Gateway Arch National Park right now?
It is currently 71°F (22°C) with mainly clear. Humidity is 72% and wind is 3 mph.
When is the best time to visit Gateway Arch National Park?
August, September and October offer the most comfortable conditions in Gateway Arch National Park, which has a continental climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is Gateway Arch National Park in?
Gateway Arch National Park observes America/Chicago (UTC-05:00). The local time is 1:08 AM.
What is the nearest airport to Gateway Arch National Park?
The closest airports are Nashville International Airport (BNA), 259 mi away and O'Hare International Airport (ORD), 261 mi away.
What are the top things to do in Gateway Arch National Park?
Popular options include Starved Rock State Park and Mammoth Cave National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (national-parks) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 25, 2026 at 1:08 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
