Monthly Climate Comparison
The biggest temperature swing occurs between October and November, as typical highs shift from 31.1°C / 87.9°F to 24.2°C / 75.5°F (about 6.9°C / 12.4°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 |
July has the warmest typical feels-like highs (41.5°C / 106.7°F), while December is coolest (15.4°C / 59.7°F).
Jan
MILD
Feb
MILD
Mar
WARM
Apr
WARM
May
HOT
Jun
HOT
Jul
HOT
Aug
HOT
Sep
HOT
Oct
WARM
Nov
MILD
Dec
MILD
| Month | Low Feels Like | High Feels Like | Category |
|---|---|---|---|
| January | 1.7°C | 15.9°C | MILD |
| February | 3.3°C | 17.6°C | MILD |
| March | 6.7°C | 22.4°C | WARM |
| April | 10.5°C | 26.6°C | WARM |
| May | 16.3°C | 32.1°C | HOT |
| June | 22.5°C | 38.3°C | HOT |
| July | 29.2°C | 41.5°C | HOT |
| August | 29.3°C | 41.1°C | HOT |
| September | 23.8°C | 37°C | HOT |
| October | 14.3°C | 28.9°C | WARM |
| November | 6.9°C | 21.2°C | MILD |
| December | 2°C | 15.4°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 | -9.7 mm | 28.4 mm | LIGHT |
| February | -9.7 mm | 32.1 mm | LIGHT |
| March | -9.7 mm | 22.2 mm | LIGHT |
| April | -9.7 mm | 7.4 mm | DRY |
| May | -9.7 mm | 3.3 mm | DRY |
| June | -9.7 mm | 2.2 mm | DRY |
| July | -9.7 mm | 28 mm | LIGHT |
| August | -9.7 mm | 26.3 mm | LIGHT |
| September | -9.7 mm | 25 mm | LIGHT |
| October | -9.7 mm | 20.1 mm | LIGHT |
| November | -9.7 mm | 14.5 mm | DRY |
| December | -9.7 mm | 27.5 mm | LIGHT |
July has the strongest peak UV (around index 8.9).
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.
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 |
December is most humid (52%), while June is driest (15.7%).
Jan
COMFORTABLE
Feb
COMFORTABLE
Mar
DRY
Apr
DRY
May
DRY
Jun
DRY
Jul
DRY
Aug
DRY
Sep
DRY
Oct
DRY
Nov
DRY
Dec
COMFORTABLE
| Month | Baseline | Humidity (avg) | Category |
|---|---|---|---|
| January | 3% | 51.2% | COMFORTABLE |
| February | 3% | 46.7% | COMFORTABLE |
| March | 3% | 36.5% | DRY |
| April | 3% | 22.9% | DRY |
| May | 3% | 17.8% | DRY |
| June | 3% | 15.7% | DRY |
| July | 3% | 29.3% | DRY |
| August | 3% | 34.2% | DRY |
| September | 3% | 33% | DRY |
| October | 3% | 31.8% | DRY |
| November | 3% | 38% | DRY |
| December | 3% | 52% | COMFORTABLE |
April has the strongest typical average wind (10.0 km/h / 6.2 mph), while December is calmest (7.3 km/h / 4.6 mph).
Jan
CALM
Feb
CALM
Mar
CALM
Apr
CALM
May
CALM
Jun
CALM
Jul
CALM
Aug
CALM
Sep
CALM
Oct
CALM
Nov
CALM
Dec
CALM
| Month | Baseline | Wind (avg) | Category |
|---|---|---|---|
| January | 6.3 km/h | 7.9 km/h | CALM |
| February | 6.3 km/h | 8.3 km/h | CALM |
| March | 6.3 km/h | 8.7 km/h | CALM |
| April | 6.3 km/h | 10 km/h | CALM |
| May | 6.3 km/h | 9.8 km/h | CALM |
| June | 6.3 km/h | 9.5 km/h | CALM |
| July | 6.3 km/h | 9 km/h | CALM |
| August | 6.3 km/h | 8 km/h | CALM |
| September | 6.3 km/h | 8.3 km/h | CALM |
| October | 6.3 km/h | 8.2 km/h | CALM |
| November | 6.3 km/h | 7.7 km/h | CALM |
| December | 6.3 km/h | 7.3 km/h | CALM |
April is windiest by P95 gust signal (48.3 km/h / 30.0 mph).
Jan
WINDY
Feb
WINDY
Mar
WINDY
Apr
WINDY
May
WINDY
Jun
WINDY
Jul
WINDY
Aug
WINDY
Sep
WINDY
Oct
WINDY
Nov
WINDY
Dec
WINDY
| Month | Baseline | Wind (gusts) | Category |
|---|---|---|---|
| January | 0 km/h | 37.1 km/h | WINDY |
| February | 0 km/h | 41.5 km/h | WINDY |
| March | 0 km/h | 44.6 km/h | WINDY |
| April | 0 km/h | 48.3 km/h | WINDY |
| May | 0 km/h | 46.1 km/h | WINDY |
| June | 0 km/h | 43.6 km/h | WINDY |
| July | 0 km/h | 43.6 km/h | WINDY |
| August | 0 km/h | 41 km/h | WINDY |
| September | 0 km/h | 42.1 km/h | WINDY |
| October | 0 km/h | 41.4 km/h | WINDY |
| November | 0 km/h | 37.4 km/h | WINDY |
| December | 0 km/h | 36 km/h | WINDY |
August has the most rain days (~6.6), while May has the fewest (~0.9). Rain days count the average number of days in a month with measurable rain (about 0.1 mm or more).
Jan
SOME
Feb
SOME
Mar
RARE
Apr
RARE
May
RARE
Jun
RARE
Jul
SOME
Aug
SOME
Sep
SOME
Oct
RARE
Nov
RARE
Dec
SOME
| Month | Baseline | Rain Days | Category |
|---|---|---|---|
| January | -1.3 days | 4.4 days | SOME |
| February | -1.3 days | 4.7 days | SOME |
| March | -1.3 days | 3.5 days | RARE |
| April | -1.3 days | 1.8 days | RARE |
| May | -1.3 days | 0.9 days | RARE |
| June | -1.3 days | 1 days | RARE |
| July | -1.3 days | 6.5 days | SOME |
| August | -1.3 days | 6.6 days | SOME |
| September | -1.3 days | 4.4 days | SOME |
| October | -1.3 days | 2.6 days | RARE |
| November | -1.3 days | 2.4 days | RARE |
| December | -1.3 days | 4.6 days | SOME |
January has the most heavy rain/washout risk days (~2). Heavy rain days are the average number of days likely to bring stronger downpours that can disrupt outdoor plans.
Jan
OCCASIONAL
Feb
OCCASIONAL
Mar
OCCASIONAL
Apr
OCCASIONAL
May
RARE
Jun
RARE
Jul
OCCASIONAL
Aug
OCCASIONAL
Sep
OCCASIONAL
Oct
OCCASIONAL
Nov
OCCASIONAL
Dec
OCCASIONAL
| Month | Baseline | Heavy Rain Days | Category |
|---|---|---|---|
| January | 0 days | 2 days | OCCASIONAL |
| February | 0 days | 2 days | OCCASIONAL |
| March | 0 days | 1 days | OCCASIONAL |
| April | 0 days | 1 days | OCCASIONAL |
| May | 0 days | 0 days | RARE |
| June | 0 days | 0 days | RARE |
| July | 0 days | 1 days | OCCASIONAL |
| August | 0 days | 1 days | OCCASIONAL |
| September | 0 days | 1 days | OCCASIONAL |
| October | 0 days | 1 days | OCCASIONAL |
| November | 0 days | 1 days | OCCASIONAL |
| December | 0 days | 2 days | OCCASIONAL |
July has the highest heat-risk day count (~30 days). Heat days are the average number of days that exceed our location-specific heat-risk threshold.
Jan
LOW
Feb
LOW
Mar
LOW
Apr
HIGH
May
SEVERE
Jun
SEVERE
Jul
SEVERE
Aug
SEVERE
Sep
SEVERE
Oct
SEVERE
Nov
LOW
Dec
LOW
| Month | Baseline | Heat Days | Category |
|---|---|---|---|
| January | 0 days | 0 days | LOW |
| February | 0 days | 0 days | LOW |
| March | 0 days | 1 days | LOW |
| April | 0 days | 10 days | HIGH |
| May | 0 days | 22 days | SEVERE |
| June | 0 days | 29 days | SEVERE |
| July | 0 days | 30 days | SEVERE |
| August | 0 days | 29 days | SEVERE |
| September | 0 days | 27 days | SEVERE |
| October | 0 days | 14 days | SEVERE |
| November | 0 days | 1 days | LOW |
| December | 0 days | 0 days | LOW |
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
Avg Low
Avg Rain
Mild winter; light layers recommended
Spring
March, April, May
Avg High
Avg Low
Avg Rain
Pleasant warming; ideal for outdoor activities
Summer
June, July, August
Avg High
Avg Low
Avg Rain
Hot and sunny; sun protection essential
Autumn
September, October, November
Avg High
Avg Low
Avg Rain
Mild conditions; transitional weather
Risk Ranking Table
A month-by-month ranking of key weather risks and comforts for this destination, based on historical climate data.
| Ranking Goal | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Lowest rain risk | May 0 risk days | Jun 0 risk days | Mar 1 risk days | Apr 1 risk days |
| Lowest heatwave risk | Jan 0 risk days | Feb 0 risk days | Dec 0 risk days | Mar 1 risk days |
| Lowest cold risk | May 0 risk days | Jun 0 risk days | Jul 0 risk days | Aug 0 risk days |
| Lowest wind disruption risk | Dec 36 km/h | Jan 37 km/h | Nov 37 km/h | Aug 41 km/h |
| Most comfortable evenings | Oct 47 / 100 | Nov 45 / 100 | May 45 / 100 | Mar 43 / 100 |
| Best outdoor reliability | Nov 74 / 100 | Mar 62 / 100 | May 59 / 100 | Jun 55 / 100 |
Monthly Details
Click any month for detailed weather information and packing advice.
Looking for the best time to visit?
Get personalized month rankings based on weather comfort, outdoor activity suitability, and seasonal conditions.
Travel planning FAQ
Frequently Asked Questions
Quick answers to the weather questions you ask the most.
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.