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Best time to visit Flagstaff, AZ, USA

Our verdict

The best time to visit Flagstaff is March-May

Flagstaff can be visited year-round, but based on the ideal climate conditions, cost of travel, and avoiding peak holiday periods, March-May is the best time to go.

In summer, the average maximum temperature is around 28℃ (83℉), but temperatures can sometimes reach as high as 31℃ (88℉) on the hottest days of the year. The average low temperatures in winter float around -4℃ (25℉), while the coldest it gets down to is about -7℃ (19℉).

If you’re a sun-chaser and want to visit Flagstaff when the days are longest, you should visit in August. To stay dry, avoid travelling to Flagstaff in July – It’s the wettest month of the year.

Continue reading to find out more about when to visit Flagstaff, including the climate, seasonal info, what to pack, FAQs, and the best tools to help you plan and book your next vacation.

Warmest month

July

Least rainfall

June

Most daylight

August

Flagstaff seasons

Before you continue, it’s important to know when the seasons are in Flagstaff as they might be different to yours depending on where in the world you’re travelling from. Flagstaff 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 Flagstaff

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 Flagstaff 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.

Flagstaff 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 Flagstaff 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

Flagstaff in January

  • Average temperature: 0℃ (32℉)
  • Average high temperature: 6℃ (43℉)
  • Average low temperature: -4℃ (25℉)
  • Average humidity: 67%
  • Average sunny days: 23 days
  • Average rainfall: 20mm (1") over 3 days
  • Average snow days: 6 days
23 days
of pure sunshine
3 days
of showers or rain

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


Flagstaff in February

  • Average temperature: 2℃ (35℉)
  • Average high temperature: 8℃ (46℉)
  • Average low temperature: -3℃ (27℉)
  • Average humidity: 60%
  • Average sunny days: 21 days
  • Average rainfall: 28mm (1") over 3 days
  • Average snow days: 6 days
21 days
of pure sunshine
3 days
of showers or rain

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


Flagstaff in March

  • Average temperature: 6℃ (43℉)
  • Average high temperature: 12℃ (54℉)
  • Average low temperature: 0℃ (33℉)
  • Average humidity: 47%
  • Average sunny days: 23 days
  • Average rainfall: 23mm (1") over 5 days
  • Average snow days: 4 days
23 days
of pure sunshine
5 days
of showers or rain

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


Flagstaff in April

  • Average temperature: 10℃ (49℉)
  • Average high temperature: 16℃ (61℉)
  • Average low temperature: 3℃ (37℉)
  • Average humidity: 36%
  • Average sunny days: 23 days
  • Average rainfall: 14mm (1") over 6 days
  • Average snow days: 2 days
23 days
of pure sunshine
6 days
of showers or rain

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


Flagstaff in May

  • Average temperature: 14℃ (57℉)
  • Average high temperature: 20℃ (69℉)
  • Average low temperature: 7℃ (44℉)
  • Average humidity: 33%
  • Average sunny days: 24 days
  • Average rainfall: 19mm (1") over 5 days
  • Average snow days: 1 days
24 days
of pure sunshine
5 days
of showers or rain

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


Flagstaff in June

  • Average temperature: 20℃ (69℉)
  • Average high temperature: 28℃ (82℉)
  • Average low temperature: 13℃ (55℉)
  • Average humidity: 24%
  • Average sunny days: 26 days
  • Average rainfall: 6mm (0") over 3 days
26 days
of pure sunshine
3 days
of showers or rain

What to pack: If you’re heading to Flagstaff 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.


Flagstaff in July

  • Average temperature: 22℃ (72℉)
  • Average high temperature: 28℃ (83℉)
  • Average low temperature: 16℃ (61℉)
  • Average humidity: 43%
  • Average sunny days: 11 days
  • Average rainfall: 69mm (3") over 16 days
11 days
of pure sunshine
16 days
of showers or rain

What to pack: If you’re heading to Flagstaff 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.


Flagstaff in August

  • Average temperature: 21℃ (70℉)
  • Average high temperature: 27℃ (81℉)
  • Average low temperature: 15℃ (59℉)
  • Average humidity: 46%
  • Average sunny days: 12 days
  • Average rainfall: 52mm (2") over 14 days
12 days
of pure sunshine
14 days
of showers or rain

What to pack: If you’re heading to Flagstaff 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.


Flagstaff in September

  • Average temperature: 18℃ (64℉)
  • Average high temperature: 24℃ (75℉)
  • Average low temperature: 12℃ (54℉)
  • Average humidity: 44%
  • Average sunny days: 18 days
  • Average rainfall: 25mm (1") over 9 days
18 days
of pure sunshine
9 days
of showers or rain

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

Flagstaff in October

  • Average temperature: 11℃ (52℉)
  • Average high temperature: 18℃ (64℉)
  • Average low temperature: 5℃ (42℉)
  • Average humidity: 45%
  • Average sunny days: 24 days
  • Average rainfall: 18mm (1") over 5 days
  • Average snow days: 1 days
24 days
of pure sunshine
5 days
of showers or rain

What to pack: If you’re heading to Flagstaff in October, make sure you pack a warm jacket or coat.


Flagstaff in November

  • Average temperature: 5℃ (41℉)
  • Average high temperature: 12℃ (53℉)
  • Average low temperature: 0℃ (32℉)
  • Average humidity: 51%
  • Average sunny days: 25 days
  • Average rainfall: 24mm (1") over 2 days
  • Average snow days: 2 days
25 days
of pure sunshine
2 days
of showers or rain

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


Flagstaff in December

  • Average temperature: 0℃ (32℉)
  • Average high temperature: 6℃ (43℉)
  • Average low temperature: -4℃ (25℉)
  • Average humidity: 64%
  • Average sunny days: 22 days
  • Average rainfall: 28mm (1") over 4 days
  • Average snow days: 7 days
22 days
of pure sunshine
4 days
of showers or rain

What to pack: If you’re heading to Flagstaff 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 Flagstaff is usually July, where temperatures tend to rise to around 28℃ (83℉) in the middle of the day or early afternoon.
The month with the least amount of rain in Flagstaff 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 Flagstaff is generally around July, although the wetter season can sometimes extend a few months either side of July too.
If you want to get the most out of your time visiting Flagstaff, or if you're just afraid of the dark, the days in August are usually the longest between sunrise and sunset.

Flagstaff map