# Best Time to Visit Yellowstone — Weather Guide by Month

**The short answer:** July and August are peak season for predictable warm weather (75-80°F), open roads, active geysers, and strong wildlife activity. September is the underrated gem with smaller crowds, cooler temps (60-70°F), and crisp mornings perfect for wildlife viewing when elk are in rut. Avoid November through March unless you're prepared for heavy snow. Roads close and some areas become inaccessible. Subzero nights are common.

## Yellowstone Monthly Weather Overview

| Month | Avg High | Avg Low | Rain Days | Highlights |
|-------|----------|---------|-----------|-----------|
| January | 32°F | 12°F | 5 | Heavy snow, roads closed, quiet |
| February | 35°F | 14°F | 5 | Coldest, snow parking lot routes |
| March | 42°F | 21°F | 5 | Warming begins, some roads open |
| April | 54°F | 30°F | 7 | Muddy, unpredictable, warming |
| May | 66°F | 38°F | 8 | Spring flowers, roads open, wildlife active |
| June | 76°F | 46°F | 8 | Warm, some higher elevation snow |
| July | 80°F | 50°F | 7 | Peak warmth, driest, all roads open |
| August | 78°F | 48°F | 8 | Still warm, afternoon thunderstorms |
| September | 68°F | 40°F | 7 | Crisp mornings, elk rut, smaller crowds |
| October | 54°F | 32°F | 7 | Fall colors, rapid cooling, early snow possible |
| November | 40°F | 22°F | 8 | Heavy snow begins, roads close |
| December | 34°F | 15°F | 6 | Deep snow, mostly closed, extreme cold |

## Best months for hiking, wildlife viewing, and geyser spotting

![A Beginner's Guide to Weather Apps: How to Choose the Best One for You](https://res.cloudinary.com/dunffzgg8/image/upload/c_limit,h_280,w_600/f_auto/fl_lossy,fl_progressive,fl_strip_profile/q_35/v1720597345/lwgogsp25uny2jyoowei.webp)

July and August deliver the most reliable experience. Daytime temps are warm (78-80°F), all park roads are open, and geyser viewing is excellent. Thermal features create visible steam even in warm weather. Wildlife is active but spread out. Elk herds graze in meadows, bison roam freely, and grizzly and black bears are awake and foraging. Crowds are heaviest, especially in July when families flood the park, but the odds of seeing geysers erupt and wildlife on the same trip are highest.

September is where the magic happens for serious visitors. Elk are in peak rut in early September. You'll hear bugling bulls and witness epic dominance displays in the Lamar Valley and Mammoth Hot Springs areas. Daytime temps are still pleasant at 68°F, nights are crisp at 40°F. This makes early morning and evening wildlife viewing comfortable. Crowds drop by 40-50% after Labor Day. Rain days are only 7, and the September light is exceptionally clean for photography.

May and June are spring alternatives. May is muddy and unpredictable (8 rain days), but wildflower meadows are erupting, and wildlife returns from winter ranges. June warms to 76°F and feels fresher than midsummer. If you don't mind a slightly wetter forecast and variable conditions, these months offer genuine solitude and active wildlife.

## Months to think twice about

November and December are when Yellowstone becomes genuinely harsh. By November, heavy snow closes the North and Northeast entrance roads. Roads that remain open (Grand Loop) require high-clearance or snow chains. December's average high is 34°F with nights dropping to 15°F. Facilities begin shutting down, and access becomes fragmented. If you're not committed to winter activities (cross-country skiing, snowmobiling), stay away.

January through March is extreme winter. Roads are officially closed except for the North entrance (Mammoth area) and a handful of interior parking lot routes requiring snowmobiles or skis. February is the coldest month at 14°F average low. Geysers are beautiful (steam contrasts dramatically against snow), but accessibility is severely limited.

October is a transition month that can swing either way. Early October (first two weeks) is often pleasant with fall colors and elk rut. Late October can bring early season snow and rapid temperature drops. Book accommodations that allow flexibility or accept weather-related changes.

## What to Pack for Yellowstone

**Layering is essential.** Yellowstone's elevation is 7,000 to 8,000 feet. Temperature swings of 30 degrees between sun and shade are common even in July.

Start with moisture-wicking baselayers. For summer (June-August), lightweight synthetic or merino blend works. For spring/fall, choose [merino wool like Darn Tough](https://amzn.to/4ehY94b). Add a fleece mid-layer and a waterproof [rain jacket](https://amzn.to/3V2LzNf). Pack a lightweight insulating layer (Patagonia Nano Puff or similar). Bring sunscreen (SPF 50+) and a hat. Afternoon thunderstorms are common in July-August, so always carry rain gear.

For September trips, add a heavier insulating layer. A [Patagonia Down Vest](https://amzn.to/3zevNHZ) packs small but traps warmth for early morning wildlife viewing. Pack warm socks and consider gaiters if you're hiking off-trail through sagebrush.

Bring a refillable water bottle. A [Hydro Flask insulated bottle](https://amzn.to/3R9tfks) keeps water cold in summer and tea warm in cooler months. For backcountry hiking or long driving days, a GPS like the [Garmin inReach](https://amzn.to/4aJwYMj) offers safety and peace of mind. Learn more in [Best Time to Visit Banff — Weather Guide by Month](/blog/best-time-to-visit-banff-weather). Learn more in [Best Time to Visit Great Smoky Mountains — Weather Guide by Month](/blog/best-time-to-visit-smoky-mountains-weather).

Winter visitors (January-March) need insulated boots rated to -20°F, a heavy parka, thermal bottoms, gloves, and a balaclava. Many winter visitors use snowmobiles or guided tours because personal vehicle access is limited.

## Plan with current conditions

![Best Weekend for Fall Foliage 2026](https://res.cloudinary.com/dunffzgg8/image/upload/c_limit,h_280,w_600/f_auto/fl_lossy,fl_progressive,fl_strip_profile/q_35/v1740615835/featured_hxuwdj.jpg)

Yellowstone's weather is highly localized by elevation and canyon proximity. North areas (Mammoth, Lamar Valley) can be 10-15°F warmer than interior highlands. Before heading out, check hourly forecasts for your specific destinations using **OpticWeather**. Our app shows precipitation type, temperature by hour, and visibility so you can plan wildlife viewing times and avoid afternoon thunderstorms.

[Check Yellowstone's forecast on OpticWeather](https://opticweather.com)


Plan your Yellowstone trip with detailed weather information by month. Best times for hiking, geysers, and wildlife viewing.

Best Time to Visit Yellowstone — Weather Guide by Month

# Best Time to Visit Zion National Park — Weather Guide by Month

**The short answer:** April-May and September-October offer the sweet spot. Moderate temps (65-80°F), low precipitation, and stable canyon conditions make these shoulder seasons ideal for The Narrows wade-through hike and Angels Landing. Avoid July-August when temps soar to 100°F, heat exhaustion is common, and flash flood risk from sudden afternoon thunderstorms makes canyons dangerous. Winter (November-February) is mild at lower elevations but unpredictable.

## Zion Monthly Weather Overview

| Month | Avg High | Avg Low | Rain Days | Highlights |
|-------|----------|---------|-----------|-----------|
| January | 52°F | 35°F | 4 | Cool, occasional frost, quiet |
| February | 56°F | 38°F | 3 | Warming, still cool, springs flowing |
| March | 64°F | 45°F | 3 | Spring warming, snow possible at rim |
| April | 74°F | 52°F | 2 | Ideal temps, low rain, Narrows accessible |
| May | 85°F | 61°F | 2 | Warming, still dry, water volume increases |
| June | 95°F | 70°F | 2 | Hot, afternoon storms building |
| July | 100°F | 76°F | 4 | Extreme heat, flash flood risk, driest |
| August | 99°F | 75°F | 4 | Still extreme, scattered storms, dangerous |
| September | 92°F | 68°F | 3 | Cooling, late summer storms, still hot |
| October | 78°F | 55°F | 2 | Perfect weather, moderate temps, crisp |
| November | 63°F | 43°F | 3 | Cooling, less crowded, stable conditions |
| December | 53°F | 36°F | 4 | Cold, quiet, occasional frost |

## Best months for Narrows wading, Angels Landing, and other hiking

![A Beginner's Guide to Weather Apps: How to Choose the Best One for You](https://res.cloudinary.com/dunffzgg8/image/upload/c_limit,h_280,w_600/f_auto/fl_lossy,fl_progressive,fl_strip_profile/q_35/v1720828133/vwmuitr6xtxlg7s17aav.webp)

**April and May are peak season for water-based hikes.** The Narrows is Zion's most iconic hike, and it requires wading waist-deep through the Virgin River. Water temps in April hover around 45-50°F. This is manageable with a wetsuit or good water shoes and quick-dry pants. Daytime temps are perfect at 74°F in April and 85°F in May, so you stay comfortable while waiting for your legs to dry. Snowmelt from the rim keeps water levels high but not dangerous. Crowds peak in May, but it's still more manageable than summer.

**October is the absolute best month.** Daytime temps cool to a perfect 78°F, nights to 55°F, and rain is virtually absent at only 2 days. The Virgin River water has warmed to around 55°F from summer heat, making wading more tolerable. Crowds thin after Labor Day. You'll have breathing room on Angels Landing's chains. Light conditions are exceptional for photography in Zion's narrow slots. Wildflowers from summer monsoons are still visible in high-elevation areas.

September is an alternative if October feels busy. Daytime temps are still warm at 92°F, but nights cool to 68°F, creating comfortable morning and evening hiking windows. Late-summer storms add visual drama to canyon walls. Just monitor forecasts carefully because thunderstorm risk is highest in early September.

**Late February through early March** offers another window for Narrows hiking if crowds matter to you. Daytime temps warm to 64°F, rain days are minimal at 3, and springs are flowing strongly from snowmelt. Water temps are cold (35-40°F), requiring a full wetsuit.

## Months to think twice about

July and August are dangerous and miserable. Daytime temps hit 100°F with virtually no shade in open desert sections. Heat exhaustion sets in fast on sustained climbs like Angels Landing. More critically, afternoon thunderstorms (July and August each have 4 rain days) create flash flood risk in narrow canyons. The Narrows becomes a serious hazard if upstream storms generate sudden water surges. The Virgin River can rise several feet in minutes, trapping hikers. Do not wade The Narrows if storms are forecast within 10 miles.

June is a transition month where temps spike to 95°F but afternoon storms are still building. It's not as dangerous as July-August, but you lose the stable weather of April-May.

November through March is quieter but unpredictable. Snow can fall at the rim (6,000+ feet elevation), but lower canyon elevations stay mild. Daytime temps range from 52-63°F, which is comfortable for hiking but requires more planning because sunrise is late and sunset is early. February has the advantage of fewer rain days (3) and flowing springs from snowmelt. Learn more in [Best Time to Visit Yellowstone — Weather Guide by Month](/blog/best-time-to-visit-yellowstone-weather). Learn more in [Best Time to Visit Great Smoky Mountains — Weather Guide by Month](/blog/best-time-to-visit-smoky-mountains-weather).

## What to Pack for Zion

**Sun protection and water management are essential.** Zion has minimal shade, intense UV exposure, and dry desert air that accelerates dehydration.

Start with light-colored, loose-fitting synthetic clothing (merino wool also works). Bring a wide-brimmed hat, sunglasses, and SPF 50+ sunscreen. Reapply every two hours.

For Narrows wading, pack water shoes or sandals with grip (essential for slick river rocks), quick-dry pants, and a lightweight long-sleeve shirt to prevent UV burns on arms. A [Nuun hydration tablet](https://amzn.to/455uZ3Q) mix keeps electrolytes balanced on long hikes. Bring a [Hydro Flask water bottle](https://amzn.to/3R9tfks) to keep water cool for the entire hike.

For desert hiking on exposed trails (Angels Landing, The Watchman), add a lightweight breathable layer and a synthetic moisture-wicking baselayer. A [Columbia PFG fishing shirt](https://amzn.to/3wZ8HEl) is perfect for Zion. It's lightweight, dries quickly, and has UPF sun protection built in.

Pack trekking poles to reduce impact on knees on steep descents. Bring more water than you think you need. For a full-day Narrows hike, carry 2-3 liters minimum. For canyon-rim trails in summer, 3-4 liters is safer.

If you're visiting in winter (November-March), add a lightweight insulating layer and waterproof jacket. High-elevation areas of Zion can reach freezing at night.

## Plan with current conditions

![Best Weekend for Fall Foliage 2026](https://res.cloudinary.com/dunffzgg8/image/upload/c_limit,h_280,w_600/f_auto/fl_lossy,fl_progressive,fl_strip_profile/q_35/v1740615835/featured_hxuwdj.jpg)

Flash flood risk in Zion canyons changes based on real-time thunderstorm development. Never wade The Narrows or explore narrow slot canyons without checking current weather. Use **OpticWeather** to monitor precipitation forecasts for your hike time and upstream areas. Our app shows storm development, rainfall amounts, and timing so you can make safe decisions about water-based hikes.

[Check Zion's forecast on OpticWeather](https://opticweather.com)


Plan your Zion trip with detailed weather guide. Best times for hiking The Narrows, Angels Landing, and desert canyoneering.

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