As of Saturday, April 25, 2026, the weather in Jackson, Wyoming, remains characterized by late-season winter conditions and typical mountain volatility. For those currently in the valley or planning an immediate visit, the short-term outlook suggests a significant cooling trend with high probabilities of snow showers through the beginning of next week.

The current conditions show mostly cloudy skies with a high temperature reaching approximately 44°F to 46°F. Overnight, temperatures are expected to drop sharply into the low 20s. A 20% to 50% chance of snow showers is forecasted for Saturday night, signaling the start of a more active weather pattern.

Seven Day Weather Outlook for Jackson Hole

The upcoming week (April 26 – May 1, 2026) reflects the classic "transitional" nature of the Teton Range. Visitors should prepare for a mix of rain, snow, and occasional sun breaks.

  • Sunday, April 26: Highs will hover near 47°F with lows around 25°F. Snow showers are likely before 3 PM, potentially transitioning into a rain/snow mix. New snow accumulation is expected to be less than half an inch in the valley, though higher elevations in the Tetons may see more.
  • Monday, April 27: Temperatures remain steady with a high of 47°F. There is a 40% chance of snow showers, and some isolated thunder is possible as spring convection begins to build.
  • Tuesday, April 28: A more consistent period of precipitation is expected. Snow showers are likely, mainly after noon, with a high of 48°F.
  • Wednesday, April 29: Conditions begin to stabilize slightly. Highs will climb to 53°F under mostly sunny skies, though a 30% chance of afternoon snow showers remains.
  • Thursday, April 30: Temperatures continue to trend upward toward 56°F. This day presents the best chance for sun, although the risk of "mountain showers" (a mix of rain and snow) persists into the evening.
  • Friday, May 1: A noticeable shift toward spring warmth occurs, with highs reaching 60°F and clear, sunny skies forecasted throughout the day.

Understanding the Jackson Hole "Mud Season"

Late April and early May in Jackson, Wyoming, are colloquially known as the "Mud Season." While many tourists anticipate the blooming wildflowers of spring, the reality at 6,237 feet (the elevation of the town) is a slow thawing process.

The weather during this period is a battle between retreating arctic air and the strengthening high-altitude sun. In our experience observing the Teton climate, the "five-minute rule" always applies: if you don't like the weather, simply wait five minutes. A blizzard can transition into blinding sunshine within the span of a short hike.

During this week, the melting snowpack at lower elevations combines with new precipitation to create saturated ground conditions. Many unpaved roads and trails in the Bridger-Teton National Forest become impassable for standard vehicles and difficult for hikers. If you are planning to explore the valley floor, waterproof footwear is not just an option—it is a necessity.

Seasonal Weather Patterns in the Teton Valley

To understand why this week is so volatile, one must look at the broader climatic context of Jackson. The region experiences a semi-arid mountain climate, where humidity is generally low but the terrain creates its own weather.

Spring (March to May)

Spring is perhaps the most unpredictable season. While March often feels like a continuation of winter with heavy snow, April introduces the first 50-degree days. However, the ground remains frozen or slushy. Average temperatures in April typically range from 24°F (low) to 48°F (high). It is a period of quiet in the town, as the ski resorts have usually closed for the season, but the summer crowds have yet to arrive.

Summer (June to August)

Summer is the peak season for a reason. Temperatures are mild and comfortable, rarely exceeding 80°F in the valley. July is typically the warmest month, with an average high of 82°F. Humidity remains low, making it ideal for strenuous hiking and climbing. However, the "monsoonal flow" can bring sudden, violent afternoon thunderstorms. These storms are often brief but can drop temperatures by 20 degrees in minutes and pose a lightning risk to those on high ridges.

Autumn (September to November)

September is arguably the most beautiful month in Jackson. The air turns crisp, and the bugling of elk replaces the sound of summer tourists. Highs fall into the 60s, and the first frosts usually occur by mid-September. By November, winter has firmly taken hold, with average highs dropping to 35°F and the first major snow accumulations beginning to build the mountain snowpack.

Winter (December to February)

Winter in Jackson is legendary for its snow quality and intensity. Average temperatures often hover between 5°F and 25°F. The valley frequently experiences "temperature inversions," where cold air is trapped on the valley floor while the mountains remain warmer and sunnier. This can lead to persistent fog and extremely cold morning temperatures in town, sometimes reaching -20°F or lower.

How Weather Impacts National Park Access

The weather in Jackson directly dictates the accessibility of its most famous neighbors: Grand Teton National Park and Yellowstone National Park.

  1. Grand Teton Access: While the Teton Park Road (the main inner loop) typically opens to motorized vehicles on May 1st, it is open to "non-motorized" use (biking, walking) in April. The current chilly weather and snow showers mean that cyclists should expect icy patches and wet conditions this week.
  2. Yellowstone Access: Most entrances to Yellowstone remain closed to wheeled vehicles until late April or early May. The West Entrance usually opens first (around April 17-20), followed by the South Entrance (connecting Jackson to Yellowstone) in mid-May. The current snow forecast for this week suggests that crews may still be dealing with significant snow removal on the high passes like Craig Pass and Sylvan Pass.
  3. The Snake River: The current mix of snow and rain contributes to the "spring runoff." As temperatures rise toward the end of the week (approaching 60°F by Friday), river levels will begin to rise. This makes for exciting but cold whitewater rafting conditions.

Essential Packing List for Jackson’s Current Climate

Based on the forecast for 44°F highs and 20°F lows with snow showers, a technical layering system is the only way to remain comfortable. Standing in the town square in the sun might feel pleasant, but as soon as a cloud covers the sun, the temperature "feels like" it has dropped 15 degrees.

Base Layers

Moisture-wicking is critical. Avoid cotton at all costs, as it retains moisture and will make you cold during the forecasted snow showers. Opt for lightweight merino wool or synthetic layers that trap heat while allowing your skin to breathe.

Mid-Layers

A "puffy" down or synthetic insulated jacket is the standard uniform in Jackson. Even in late April, locals rarely leave the house without a light down hoody. It provides the necessary loft to stay warm during the 25°F nights.

Outer Shell

Since the forecast calls for a rain/snow mix and potential thunder, a waterproof and windproof hardshell is mandatory. The winds in the valley can be gusty, especially near the Jackson Hole Airport, and a shell will prevent the wind from stripping away your body heat.

Footwear and Accessories

  • Waterproof Boots: With the melting snow and predicted rain, the streets and trails are muddy. Gore-Tex lined hiking boots or treated leather boots are recommended.
  • Gloves and Beanies: Do not be fooled by the 46°F high. When the wind picks up, exposed skin will quickly become uncomfortable. A light pair of gloves and a knit hat should be kept in your daypack.
  • Sun Protection: Despite the cloud cover, the UV index in Jackson is much higher than at sea level due to the altitude. High-SPF sunscreen and polarized sunglasses are necessary to prevent snow blindness and sunburn.

Strategic Planning: When to Visit Based on Weather

Deciding when to visit Jackson depends on your tolerance for the elements and your desired activities.

  • For Skiing: January and February offer the most reliable snowpack, though temperatures are at their most extreme.
  • For Wildlife Viewing: May and June are spectacular as mothers and calves emerge and move to lower elevations. The weather is wet, but the sightings are unparalleled.
  • For Hiking: Wait until July. Many of the high-altitude trails in the Tetons remain snow-covered until mid-July.
  • For Photography: Late September offers the best light and the famous gold colors of the aspen trees, with generally stable high-pressure weather systems.

Summary of the Current Week

The week of April 25, 2026, is a classic example of Teton transition. While the early part of the week is dominated by cold air and snow showers (highs in the mid-40s), there is light at the end of the tunnel. By Friday, May 1, the weather is expected to clear significantly, with temperatures hitting a spring-like 60°F. This shift marks the beginning of the end for the deep valley snow and the start of the true spring season.

Frequently Asked Questions (FAQ)

What is the best month to visit Jackson Wyoming for good weather?

For most visitors, July and August offer the best weather. Daytime temperatures are in the high 70s, nights are cool but not freezing, and all park roads and trails are open. However, this is also the busiest time of year.

Does it snow in Jackson Wyoming in the summer?

While rare, it is not impossible. Snow has been recorded in every month of the year in the Teton Range. It is quite common to see snow at the top of Rendezvous Mountain (10,450ft) even in July or August, though it rarely stays on the valley floor during these months.

Why is Jackson Hole Airport often affected by weather?

Jackson Hole Airport (JAC) is the only commercial airport in the U.S. located inside a National Park. Its high elevation and proximity to the mountains mean it is subject to sudden wind shears and heavy snowfall, which can occasionally lead to flight delays or diversions to Salt Lake City or Idaho Falls.

What should I wear if I am visiting this week?

Dress in three layers: a sweat-wicking base layer, an insulating mid-layer (like a fleece or down vest), and a waterproof outer shell. Expect to add or remove layers throughout the day as the sun goes behind clouds or snow showers begin.

Are the roads in Grand Teton National Park open right now?

The main highways (US-191/89/26) are open year-round. However, the Teton Park Road and other secondary roads are in the process of being cleared of snow in late April and usually open to cars on May 1st.