COVID-19 (Coronavirus) may impact your travel plans and the data on our site. Stay safe, and always check official travel advice before you book.

Best time to visit Grand Junction, CO, USA

Our verdict

The best time to visit Grand Junction is May

While Grand Junction is a popular destination to visit all year round, May is the ideal time to go due to a number of factors such as the climate, cost of travel and accommodation, as well as avoiding peak holiday periods.

In the summer months, temperatures tend to get to a maximum of around 33℃ (91℉). The weather at night in the winter, which is around January-time, can get down to a minimum of -12℃ (10℉).

The longest days between sunrise and sunset in Grand Junction are usually in August, so if you want to get the most out of your daytime activities, be sure to plan your visit around this time. On average it rains the most days in March, making it the wettest month of the year. Although it’s the wet season, it can often rain a little bit during the day or evening but have fine weather for a majority of the day too, so don’t let this put you off.

Keep reading to learn more about the best times to go to Grand Junction, including detailed weather information and tools to help you find and book great deals on your travel.

Warmest month

July

Least rainfall

June

Most daylight

August

Grand Junction seasons

Before you continue, it’s important to know when the seasons are in Grand Junction as they might be different to yours depending on where in the world you’re travelling from. Grand Junction is in the Northern Hemisphere, so the seasons fall during these months:

SeasonMonths
Summer June to August
Autumn/fall September to November
Winter December to February
Spring March to May

Average temperatures in Grand Junction

If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Grand Junction for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.

Grand Junction climate by month

If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Grand Junction for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.

Jump to:

JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC

Grand Junction in January

  • Average temperature: -4℃ (26℉)
  • Average high temperature: 2℃ (35℉)
  • Average low temperature: -8℃ (18℉)
  • Average humidity: 78%
  • Average sunny days: 19 days
  • Average rainfall: 17mm (1") over 7 days
  • Average snow days: 8 days
19 days
of pure sunshine
7 days
of showers or rain

What to pack: If you’re heading to Grand Junction in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Grand Junction in February

  • Average temperature: -1℃ (31℉)
  • Average high temperature: 4℃ (40℉)
  • Average low temperature: -5℃ (24℉)
  • Average humidity: 71%
  • Average sunny days: 16 days
  • Average rainfall: 18mm (1") over 7 days
  • Average snow days: 7 days
16 days
of pure sunshine
7 days
of showers or rain

What to pack: If you’re heading to Grand Junction in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Grand Junction in March

  • Average temperature: 5℃ (41℉)
  • Average high temperature: 10℃ (51℉)
  • Average low temperature: 0℃ (33℉)
  • Average humidity: 55%
  • Average sunny days: 18 days
  • Average rainfall: 27mm (1") over 10 days
  • Average snow days: 2 days
18 days
of pure sunshine
10 days
of showers or rain

What to pack: If you’re heading to Grand Junction in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Grand Junction in April

  • Average temperature: 9℃ (48℉)
  • Average high temperature: 15℃ (58℉)
  • Average low temperature: 3℃ (38℉)
  • Average humidity: 44%
  • Average sunny days: 17 days
  • Average rainfall: 17mm (1") over 10 days
  • Average snow days: 1 days
17 days
of pure sunshine
10 days
of showers or rain

What to pack: If you’re heading to Grand Junction in April, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Grand Junction in May

  • Average temperature: 14℃ (57℉)
  • Average high temperature: 21℃ (69℉)
  • Average low temperature: 7℃ (45℉)
  • Average humidity: 37%
  • Average sunny days: 20 days
  • Average rainfall: 14mm (1") over 8 days
20 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Grand Junction in May, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.


Grand Junction in June

  • Average temperature: 20℃ (69℉)
  • Average high temperature: 28℃ (82℉)
  • Average low temperature: 13℃ (55℉)
  • Average humidity: 29%
  • Average sunny days: 22 days
  • Average rainfall: 11mm (0") over 5 days
22 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to Grand Junction in June, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Grand Junction in July

  • Average temperature: 23℃ (74℉)
  • Average high temperature: 30℃ (87℉)
  • Average low temperature: 16℃ (61℉)
  • Average humidity: 37%
  • Average sunny days: 16 days
  • Average rainfall: 16mm (1") over 8 days
16 days
of pure sunshine
8 days
of showers or rain

What to pack: If you’re heading to Grand Junction in July, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Grand Junction in August

  • Average temperature: 22℃ (71℉)
  • Average high temperature: 29℃ (83℉)
  • Average low temperature: 15℃ (59℉)
  • Average humidity: 39%
  • Average sunny days: 16 days
  • Average rainfall: 20mm (1") over 9 days
16 days
of pure sunshine
9 days
of showers or rain

What to pack: If you’re heading to Grand Junction in August, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.


Grand Junction in September

  • Average temperature: 18℃ (64℉)
  • Average high temperature: 25℃ (77℉)
  • Average low temperature: 12℃ (53℉)
  • Average humidity: 39%
  • Average sunny days: 19 days
  • Average rainfall: 16mm (1") over 7 days
19 days
of pure sunshine
7 days
of showers or rain

What to pack: If you’re heading to Grand Junction in September, make sure you pack a coat or jumper for the evenings, and t-shirts and light gear for the daytime.

Grand Junction in October

  • Average temperature: 10℃ (50℉)
  • Average high temperature: 16℃ (61℉)
  • Average low temperature: 5℃ (41℉)
  • Average humidity: 46%
  • Average sunny days: 21 days
  • Average rainfall: 24mm (1") over 7 days
  • Average snow days: 1 days
21 days
of pure sunshine
7 days
of showers or rain

What to pack: If you’re heading to Grand Junction in October, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Grand Junction in November

  • Average temperature: 4℃ (38℉)
  • Average high temperature: 9℃ (49℉)
  • Average low temperature: -1℃ (31℉)
  • Average humidity: 54%
  • Average sunny days: 22 days
  • Average rainfall: 14mm (1") over 6 days
  • Average snow days: 2 days
22 days
of pure sunshine
6 days
of showers or rain

What to pack: If you’re heading to Grand Junction in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Grand Junction in December

  • Average temperature: -3℃ (27℉)
  • Average high temperature: 2℃ (36℉)
  • Average low temperature: -6℃ (21℉)
  • Average humidity: 69%
  • Average sunny days: 20 days
  • Average rainfall: 20mm (1") over 7 days
  • Average snow days: 7 days
20 days
of pure sunshine
7 days
of showers or rain

What to pack: If you’re heading to Grand Junction in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.


Top FAQs

The hottest month of the year in Grand Junction is usually July, where temperatures tend to rise to around 30℃ (87℉) in the middle of the day or early afternoon.
The month with the least amount of rain in Grand Junction is generally around June. The dry season often coincides with cooler weather, so you should check the temperatures in June first to make sure it’s still a good time to go.
The rainiest time of year in Grand Junction is generally around March, although the wetter season can sometimes extend a few months either side of March too.
If you want to get the most out of your time visiting Grand Junction, or if you're just afraid of the dark, the days in August are usually the longest between sunrise and sunset.

Grand Junction map