Tucson weather in May

In May, Tucson sees average daytime highs of 89°F and overnight lows near 63°F, with 0.1 in of rain across 0.8 wet days and about 13.6 hours of daylight. It is the 5th-warmest and 12th-wettest month of the year here.

Highs climb over the month, from about 86°F in the first days to 93°F by the end. The sky is clear or mostly clear about 77% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of May to 13 h 54 min by month's end. Set against the rest of the year, May is Tucson's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Tucson's year-round climate.

Daytime high: 89°; 5th warmest
Overnight low: 63°; 8th coldest
Rainfall: 0.1 in; 0.8 wet days
Daylight: 13 h 36 min; 5:31 AM – 7:09 PM
Cloud cover: 22%; 3rd clearest
Wind: 7 mph; 2nd windiest
Solar energy: 8.24 kWh/m²
Travel score: 5.5; out of 10

Tucson is city in and county seat of Pima County, Arizona, United States.

Density: 906/km²; people per km²
Founded: 1775

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← April Tucson year-round climate June →Best places to visit in May

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 86°F in the first days to 93°F by the end.

A typical May day in Tucson reaches about 89°F in the afternoon and slips back to 63°F overnight — a 26°F spread between the day's warmth and the night's chill. On most days the high lands between 80°F and 97°F. Set against its neighbours, May runs about 9°F warmer than April and about 9°F cooler than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	85	85	86	86	86	87	87	87	87	88	88	88	88	89	89	89	89	90	90	90	90	91	91	91	91	92	92	92	93	93	94
Avg low (°F)	59	59	60	60	60	60	61	61	61	62	62	62	62	62	63	63	63	64	64	64	64	64	65	65	65	65	66	66	67	67	67

	Avg high (°F)	Avg low (°F)
1	85	59
2	85	59
3	86	60
4	86	60
5	86	60
6	87	60
7	87	61
8	87	61
9	87	61
10	88	62
11	88	62
12	88	62
13	88	62
14	89	62
15	89	63
16	89	63
17	89	63
18	90	64
19	90	64
20	90	64
21	90	64
22	91	64
23	91	65
24	91	65
25	91	65
26	92	65
27	92	66
28	92	66
29	93	67
30	93	67
31	94	67

How May really feels in Tucson

Once humidity and wind are folded in, May averages 14 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Tucson weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	64° / 41°	1.1	4	10.1	7.0
Feb	67° / 44°	1.1	3.9	10.8	7.3
Mar	73° / 49°	0.7	3	11.8	8.4
Apr	80° / 55°	0.2	1.4	12.8	8.3
May	89° / 63°	0.1	0.8	13.6	5.5
Jun	98° / 72°	0.2	1.2	14.1	2.3
Jul	98° / 77°	1.3	7.8	13.9	2.0
Aug	96° / 76°	1.3	7.5	13.2	2.5
Sep	92° / 71°	1.0	3.7	12.2	4.0
Oct	84° / 60°	0.6	2.3	11.2	7.2
Nov	72° / 49°	0.7	2.5	10.3	8.4
Dec	63° / 41°	1.2	4.2	9.9	6.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 77% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 12%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	87	88	88	88	87	87	87	87	87	87	86	86	86	86	86	86	86	87	87	88	88	88	88	88	89	89	89	89	89	90	90
Cloudier (%)	13	12	12	12	13	13	13	13	13	13	14	14	14	14	14	14	14	13	13	12	12	12	12	12	11	11	11	11	11	10	10

	Clearer (%)	Cloudier (%)
1	87	13
2	88	12
3	88	12
4	88	12
5	87	13
6	87	13
7	87	13
8	87	13
9	87	13
10	87	13
11	86	14
12	86	14
13	86	14
14	86	14
15	86	14
16	86	14
17	86	14
18	87	13
19	87	13
20	88	12
21	88	12
22	88	12
23	88	12
24	88	12
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	90	10
31	90	10

Chance of precipitation in May

Any precipitation

Tucson gets around 0.1 in of rain over 0.8 wet days in May, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 2% and peaks near 3% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	3	2	2	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	3	3	3	2	2	2	2	2

	Rain chance (%)
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	2
9	2
10	2
11	2
12	2
13	3
14	3
15	3
16	3
17	3
18	3
19	3
20	3
21	3
22	3
23	3
24	3
25	3
26	3
27	2
28	2
29	2
30	2
31	2

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in May

Winds average 7 mph in May.

Across May, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	6	6	6	6	6	6	6
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (mph)	Feels
1	7	calm
2	7	calm
3	7	calm
4	7	calm
5	7	calm
6	7	calm
7	7	calm
8	7	calm
9	7	calm
10	7	calm
11	7	calm
12	7	calm
13	7	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	calm
22	7	calm
23	7	calm
24	7	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	6	calm
31	6	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 min at the start of May to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 36 minutes over May. Sunrise moves from 5:43 AM to 5:23 AM, and sunset from 6:58 PM to 7:19 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	13.3	13.3	13.3	13.3	13.4	13.4	13.4	13.4	13.5	13.5	13.5	13.5	13.6	13.6	13.6	13.6	13.7	13.7	13.7	13.7	13.8	13.8	13.8	13.8	13.8	13.9	13.9	13.9	13.9	13.9	13.9
Sunrise (AM)	5:43	5:42	5:41	5:40	5:40	5:39	5:38	5:37	5:36	5:35	5:34	5:34	5:33	5:32	5:31	5:31	5:30	5:29	5:29	5:28	5:27	5:27	5:26	5:26	5:25	5:25	5:24	5:24	5:24	5:23	5:23
Sunset (PM)	6:58	6:59	7:00	7:01	7:01	7:02	7:03	7:04	7:04	7:05	7:06	7:06	7:07	7:08	7:09	7:09	7:10	7:11	7:11	7:12	7:13	7:13	7:14	7:15	7:15	7:16	7:17	7:17	7:18	7:19	7:19

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.3	5:43	6:58
2	13.3	5:42	6:59
3	13.3	5:41	7:00
4	13.3	5:40	7:01
5	13.4	5:40	7:01
6	13.4	5:39	7:02
7	13.4	5:38	7:03
8	13.4	5:37	7:04
9	13.5	5:36	7:04
10	13.5	5:35	7:05
11	13.5	5:34	7:06
12	13.5	5:34	7:06
13	13.6	5:33	7:07
14	13.6	5:32	7:08
15	13.6	5:31	7:09
16	13.6	5:31	7:09
17	13.7	5:30	7:10
18	13.7	5:29	7:11
19	13.7	5:29	7:11
20	13.7	5:28	7:12
21	13.8	5:27	7:13
22	13.8	5:27	7:13
23	13.8	5:26	7:14
24	13.8	5:26	7:15
25	13.8	5:25	7:15
26	13.9	5:25	7:16
27	13.9	5:24	7:17
28	13.9	5:24	7:17
29	13.9	5:24	7:18
30	13.9	5:23	7:19
31	13.9	5:23	7:19

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 8.24 kWh/m².

For context, solar energy here swings from a low near 3.37 kWh/m² to a high of 8.35 kWh/m² in June across the year — May's 8.24 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	8.0	8.1	8.1	8.1	8.1	8.1	8.1	8.1	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.2	8.3	8.3	8.3	8.3	8.3	8.3	8.3	8.4	8.4	8.4	8.4	8.4	8.4	8.4
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	8.0	Intense
2	8.1	Intense
3	8.1	Intense
4	8.1	Intense
5	8.1	Intense
6	8.1	Intense
7	8.1	Intense
8	8.1	Intense
9	8.2	Intense
10	8.2	Intense
11	8.2	Intense
12	8.2	Intense
13	8.2	Intense
14	8.2	Intense
15	8.2	Intense
16	8.2	Intense
17	8.2	Intense
18	8.3	Intense
19	8.3	Intense
20	8.3	Intense
21	8.3	Intense
22	8.3	Intense
23	8.3	Intense
24	8.3	Intense
25	8.4	Intense
26	8.4	Intense
27	8.4	Intense
28	8.4	Intense
29	8.4	Intense
30	8.4	Intense
31	8.4	Intense

Planning a trip in May

Is May a good time to visit Tucson?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.5

Sightseeing

8th-best month of the year

8.4

Beach & pool

3rd-best month of the year

May is a reasonable time to visit Tucson for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Tucson in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Tucson sees daytime highs around 89°F and nights near 63°F. Pack light clothes and sun protection.

light clothessun protection

UV index in Tucson in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tucson peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	4	5	6	9	9	11	11	11	10	7	5	3
Level	Moderate	Moderate	High	Very high	Very high	Extreme	Extreme	Extreme	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	4	Moderate
Feb	5	Moderate
Mar	6	High
Apr	9	Very high
May	9	Very high
Jun	11	Extreme
Jul	11	Extreme
Aug	11	Extreme
Sep	10	Very high
Oct	7	High
Nov	5	Moderate
Dec	3	Moderate

Air quality in Tucson in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Tucson is worst in June — around 15 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (December, 9 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	10	10	11	12	11	15	12	11	11	10	10	9
Level	Good	Good	Good	Good	Good	Moderate	Moderate	Good	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	10	Good
Feb	10	Good
Mar	11	Good
Apr	12	Good
May	11	Good
Jun	15	Moderate
Jul	12	Moderate
Aug	11	Good
Sep	11	Good
Oct	10	Good
Nov	10	Good
Dec	9	Good

Location & terrain

Where is Tucson?

Tucson sits at 32.2°N, 110.9°W, 2,490 ft above sea level, in United States. The nearest listed city is Catalina Foothills, 5.0 mi away.

Topography around Tucson

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Tucson.

Within 2 miles, the terrain around Tucson has only modest variations in elevation — a maximum elevation change of 157 ft around an average of 2,477 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 4,455 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 7,730 ft.

The land around Tucson is covered by artificial surfaces (88%) within 2 miles, artificial surfaces (46%) and shrubs (43%) within 10 miles, and shrubs (80%) within 50 miles.

2 miles

157 ft

artificial surfaces 88%

10 miles

4,455 ft

artificial surfaces 46%

50 miles

7,730 ft

shrubs 80%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← April Tucson year-round climate June →Best places to visit in May

May weather nearby: Catalina Foothills 5.0 mi · Flowing Wells 6.8 mi · Casas Adobes 8.1 mi · Drexel Heights 8.1 mi · Tanque Verde 11 mi · Oro Valley 12 mi · Vail 17 mi · Sahuarita 18 mi

United States travel facts

Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 100% of US; price level, 2025
GDP per capita: $90,027; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 5.8; per 100k, 2023
Road deaths: 12.7; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Tucson (32.2217°, -110.9265°, elevation 2,490 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°F)	Avg low (°F)
1	85	59
2	85	59
3	86	60
4	86	60
5	86	60
6	87	60
7	87	61
8	87	61
9	87	61
10	88	62
11	88	62
12	88	62
13	88	62
14	89	62
15	89	63
16	89	63
17	89	63
18	90	64
19	90	64
20	90	64
21	90	64
22	91	64
23	91	65
24	91	65
25	91	65
26	92	65
27	92	66
28	92	66
29	93	67
30	93	67
31	94	67

	Clearer (%)	Cloudier (%)
1	87	13
2	88	12
3	88	12
4	88	12
5	87	13
6	87	13
7	87	13
8	87	13
9	87	13
10	87	13
11	86	14
12	86	14
13	86	14
14	86	14
15	86	14
16	86	14
17	86	14
18	87	13
19	87	13
20	88	12
21	88	12
22	88	12
23	88	12
24	88	12
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	90	10
31	90	10

	Rain chance (%)
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	2
9	2
10	2
11	2
12	2
13	3
14	3
15	3
16	3
17	3
18	3
19	3
20	3
21	3
22	3
23	3
24	3
25	3
26	3
27	2
28	2
29	2
30	2
31	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	85	59
2	85	59
3	86	60
4	86	60
5	86	60
6	87	60
7	87	61
8	87	61
9	87	61
10	88	62
11	88	62
12	88	62
13	88	62
14	89	62
15	89	63
16	89	63
17	89	63
18	90	64
19	90	64
20	90	64
21	90	64
22	91	64
23	91	65
24	91	65
25	91	65
26	92	65
27	92	66
28	92	66
29	93	67
30	93	67
31	94	67

	Clearer (%)	Cloudier (%)
1	87	13
2	88	12
3	88	12
4	88	12
5	87	13
6	87	13
7	87	13
8	87	13
9	87	13
10	87	13
11	86	14
12	86	14
13	86	14
14	86	14
15	86	14
16	86	14
17	86	14
18	87	13
19	87	13
20	88	12
21	88	12
22	88	12
23	88	12
24	88	12
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	90	10
31	90	10

	Rain chance (%)
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	2
9	2
10	2
11	2
12	2
13	3
14	3
15	3
16	3
17	3
18	3
19	3
20	3
21	3
22	3
23	3
24	3
25	3
26	3
27	2
28	2
29	2
30	2
31	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	85	59
2	85	59
3	86	60
4	86	60
5	86	60
6	87	60
7	87	61
8	87	61
9	87	61
10	88	62
11	88	62
12	88	62
13	88	62
14	89	62
15	89	63
16	89	63
17	89	63
18	90	64
19	90	64
20	90	64
21	90	64
22	91	64
23	91	65
24	91	65
25	91	65
26	92	65
27	92	66
28	92	66
29	93	67
30	93	67
31	94	67

	Clearer (%)	Cloudier (%)
1	87	13
2	88	12
3	88	12
4	88	12
5	87	13
6	87	13
7	87	13
8	87	13
9	87	13
10	87	13
11	86	14
12	86	14
13	86	14
14	86	14
15	86	14
16	86	14
17	86	14
18	87	13
19	87	13
20	88	12
21	88	12
22	88	12
23	88	12
24	88	12
25	89	11
26	89	11
27	89	11
28	89	11
29	89	11
30	90	10
31	90	10

	Rain chance (%)
1	3
2	2
3	2
4	2
5	2
6	2
7	2
8	2
9	2
10	2
11	2
12	2
13	3
14	3
15	3
16	3
17	3
18	3
19	3
20	3
21	3
22	3
23	3
24	3
25	3
26	3
27	2
28	2
29	2
30	2
31	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100