Weather by Month in Phoenix
Monthly Climate Comparison
The biggest temperature swing occurs between October and November, with a change of 6.9°C / 44.4°F.
Jan
MILD
Feb
MILD
Mar
WARM
Apr
WARM
May
HOT
Jun
HOT
Jul
HOT
Aug
HOT
Sep
HOT
Oct
HOT
Nov
WARM
Dec
MILD
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | 5°C | 18.9°C | MILD |
| February | 6.5°C | 20.6°C | MILD |
| March | 9.7°C | 25°C | WARM |
| April | 13.9°C | 29.4°C | WARM |
| May | 19.2°C | 34.4°C | HOT |
| June | 24.7°C | 40°C | HOT |
| July | 28.5°C | 41°C | HOT |
| August | 27.9°C | 39.9°C | HOT |
| September | 24°C | 37.3°C | HOT |
| October | 16.5°C | 31.1°C | HOT |
| November | 9.9°C | 24.2°C | WARM |
| December | 5.2°C | 18.3°C | MILD |
February is wettest at 32.1 mm / 1.26 inches, while June is driest at 2.2 mm / 0.09 inches.
Jan
LIGHT
Feb
LIGHT
Mar
LIGHT
Apr
DRY
May
DRY
Jun
DRY
Jul
LIGHT
Aug
LIGHT
Sep
LIGHT
Oct
LIGHT
Nov
DRY
Dec
LIGHT
| Month | Baseline | Rainfall | Category |
|---|---|---|---|
| January | 0 mm | 28.4 mm | LIGHT |
| February | 0 mm | 32.1 mm | LIGHT |
| March | 0 mm | 22.2 mm | LIGHT |
| April | 0 mm | 7.4 mm | DRY |
| May | 0 mm | 3.3 mm | DRY |
| June | 0 mm | 2.2 mm | DRY |
| July | 0 mm | 28 mm | LIGHT |
| August | 0 mm | 26.3 mm | LIGHT |
| September | 0 mm | 25 mm | LIGHT |
| October | 0 mm | 20.1 mm | LIGHT |
| November | 0 mm | 14.5 mm | DRY |
| December | 0 mm | 27.5 mm | LIGHT |
July has the strongest UV (about index 8.9), rated very high.
Jan
MODERATE
Feb
HIGH
Mar
HIGH
Apr
VERY HIGH
May
VERY HIGH
Jun
VERY HIGH
Jul
VERY HIGH
Aug
VERY HIGH
Sep
HIGH
Oct
HIGH
Nov
MODERATE
Dec
MODERATE
| Month | Baseline | UV Index | Category |
|---|---|---|---|
| January | 0 | 4.7 | MODERATE |
| February | 0 | 6.1 | HIGH |
| March | 0 | 7.5 | HIGH |
| April | 0 | 8.3 | VERY HIGH |
| May | 0 | 8.8 | VERY HIGH |
| June | 0 | 8.9 | VERY HIGH |
| July | 0 | 8.9 | VERY HIGH |
| August | 0 | 8.7 | VERY HIGH |
| September | 0 | 8 | HIGH |
| October | 0 | 6.6 | HIGH |
| November | 0 | 5.2 | MODERATE |
| December | 0 | 4 | MODERATE |
Daylight ranges from 10h in December to 14.3h in June, a 4.4h difference.
Jan
BALANCED
Feb
BALANCED
Mar
BALANCED
Apr
LONG
May
LONG
Jun
LONG
Jul
LONG
Aug
LONG
Sep
BALANCED
Oct
BALANCED
Nov
BALANCED
Dec
SHORT
| Month | Baseline | Daylight Hours | Category |
|---|---|---|---|
| January | 0h | 10.2h | BALANCED |
| February | 0h | 11h | BALANCED |
| March | 0h | 12h | BALANCED |
| April | 0h | 13h | LONG |
| May | 0h | 13.9h | LONG |
| June | 0h | 14.3h | LONG |
| July | 0h | 14.1h | LONG |
| August | 0h | 13.3h | LONG |
| September | 0h | 12.4h | BALANCED |
| October | 0h | 11.3h | BALANCED |
| November | 0h | 10.4h | BALANCED |
| December | 0h | 10h | SHORT |
Rain & Sunshine Patterns
Driest Months
#1 June
Best for: outdoor activities & sightseeing
#2 May
Best for: outdoor activities & sightseeing
#3 April
Best for: outdoor activities & sightseeing
Wettest Months
#1 February
Expect: possible showers, pack waterproofs
#2 January
Expect: possible showers, pack waterproofs
#3 July
Expect: possible showers, pack waterproofs
UV & Sun Protection Calendar
High UV Alert:
February, March, April, May, June, July, August, September, October require serious sun protection.
Jan
5
MODERATE
Feb
6
HIGH
Mar
7
HIGH
Apr
8
VERY-HIGH
May
9
VERY-HIGH
Jun
9
VERY-HIGH
Jul
9
VERY-HIGH
Aug
9
VERY-HIGH
Sep
8
HIGH
Oct
7
HIGH
Nov
5
MODERATE
Dec
4
MODERATE
Extreme (11+)
Avoid sun during midday, use SPF 50+
Very High (8-10)
Essential sun protection required
High (6-7)
Use SPF 30+, wear hat & sunglasses
Moderate (3-5)
Sun protection recommended
Low-Moderate (1-2)
Minimal protection needed
Low (0)
No protection required
Daylight Hours
Daylight varies from 10 hours in December (winter) to 14.3 hours in June (summer), which is a difference of 4.3 hours.
Shortest Days
December
10h
Average Sunrise:07:24
Average Sunset:17:22
Plan daytime activities for midday when light is best. Early sunsets mean evening plans should account for darkness.
Longest Days
June
14.3h
Average Sunrise:05:18
Average Sunset:19:38
Extended daylight perfect for evening activities and late dining. You can fit more sightseeing into each day.
Wind & Humidity Overview
Wind Conditions
Average wind speed
Windiest months:
April (10 km/h)
May (10 km/h)
June (10 km/h)
Packing tip: Conditions are generally calm, but a light layer is always handy.
Humidity Levels
Average humidity
34%
Most humid:
December (52%)
Least humid:
June (16%)
Packing tip: Standard clothing works fine; humidity is generally comfortable.
Seasonal Overview
Northern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
Winter
January, February, December
Avg High 19°C
Avg Low 6°C
Avg Rain 29 mm
Mild winter; light layers recommended
Spring
March, April, May
Avg High 30°C
Avg Low 14°C
Avg Rain 11 mm
Pleasant warming; ideal for outdoor activities
Summer
June, July, August
Avg High 40°C
Avg Low 27°C
Avg Rain 19 mm
Hot and sunny; sun protection essential
Autumn
September, October, November
Avg High 31°C
Avg Low 17°C
Avg Rain 20 mm
Mild conditions; transitional weather
Monthly Details
Click any month for detailed weather information and packing advice.
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View Best Time to VisitFrequently Asked Questions
When is Phoenix warmest?
July is typically the warmest month in Phoenix, with average high temperatures reaching around 41°C (106°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
When is Phoenix coldest?
January is usually the coldest month, with average low temperatures dropping to around 5°C (41°F). Pack warm layers if visiting during this time, especially for evening activities.
When does Phoenix get the most rain?
February typically sees the most rainfall in Phoenix, averaging around 32mm (1.3 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
What is the driest month in Phoenix?
June is typically the driest month, with average rainfall of just 2mm (0.1 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
How much does the temperature vary in Phoenix throughout the year?
Temperatures in Phoenix range from average lows of 16°C (61°F) to highs of 30°C (86°F). This variation means you'll want to pack differently depending on when you visit, as layers are key for adapting to the seasonal changes.
Do I need sun protection when visiting Phoenix?
Yes, sun protection is important in Phoenix. UV levels can reach 9 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.