Rioja weather in May

In May, Rioja sees average daytime highs of 24°C and overnight lows near 15°C, with 114 mm of rain across 24 wet days and about 11.7 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 8% of the time in May, and the air most often feels humid.

Daylight stretches from about 11 h 48 min at the start of May to 11 h 42 min by month's end. Set against the rest of the year, May is Rioja's 5th-clearest and 10th-windiest month. For the whole year in context, see Rioja's year-round climate.

Daytime high
24°
6th warmest
Overnight low
15°
5th coldest
Rainfall
114 mm
24 wet days
Daylight
11 h 42 min
6:13 AM – 5:57 PM
Cloud cover
70%
5th clearest
Wind
4 km/h
10th windiest
Solar energy
4.7 kWh/m²
Travel score
4.7
out of 10

Rioja is town in San Martín, Peru.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical May day in Rioja reaches about 24°C in the afternoon and slips back to 15°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 26°C. Set against its neighbours, May runs on par with April and on par with June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12515
22515
32515
42515
52515
62515
72515
82515
92515
102515
112515
122515
132515
142515
152415
162415
172415
182415
192415
202415
212415
222415
232415
242415
252415
262415
272415
282415
292415
302415
312415

Rioja weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 16°14822.812.34.7
Feb24° / 16°15322.512.24.4
Mar24° / 16°19725.8124.2
Apr25° / 16°15925.311.94.2
May24° / 15°1142411.74.7
Jun24° / 14°7017.711.75.8
Jul24° / 14°5414.411.76.4
Aug25° / 14°4212.211.86.7
Sep26° / 15°5514.3125.9
Oct25° / 15°11720.912.14.9
Nov25° / 16°16624.912.34.3
Dec24° / 16°15224.712.34.4

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 24% of May, with mostly cloudy or overcast conditions the remaining 68%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12674
22773
32872
42971
53070
63169
73268
83268
93367
103466
113466
123466
133367
143367
153268
163268
173268
183169
193169
203070
213070
223268
233268
243268
253268
263268
273367
283367
293565
303664
313763

Chance of precipitation in May

Any precipitation

Rioja gets around 114 mm of rain over 24 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 78% and peaks near 83% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
183
282
382
481
581
680
780
879
979
1079
1179
1279
1379
1479
1579
1679
1779
1878
1978
2078
2177
2277
2376
2475
2575
2674
2773
2873
2972
3071
3170

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the humid band about 83% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1014860
2014860
3014860
4014860
5014860
6014860
7014860
8014860
9014860
10014860
11014860
12014860
13014860
14013870
15013870
16013870
17013870
18014860
19014860
20014860
21015850
22016840
23117811
24118801
25119791
26120781
27122770
28123760
29125740
30126730
31128710

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 48 min at the start of May to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over May. Sunrise moves from 6:12 AM to 6:16 AM, and sunset from 6:00 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:126:00
211.86:125:59
311.86:125:59
411.86:125:59
511.86:125:59
611.86:125:58
711.86:125:58
811.86:125:58
911.86:125:58
1011.76:135:58
1111.76:135:57
1211.76:135:57
1311.76:135:57
1411.76:135:57
1511.76:135:57
1611.76:135:57
1711.76:135:57
1811.76:135:56
1911.76:145:56
2011.76:145:56
2111.76:145:56
2211.76:145:56
2311.76:145:56
2411.76:145:56
2511.76:155:56
2611.76:155:56
2711.76:155:56
2811.76:155:56
2911.76:155:56
3011.76:165:56
3111.76:165:56

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.7 kWh/m².

For context, solar energy here swings from a low near 4.6 kWh/m² to a high of 5.63 kWh/m² in September across the year — May's 4.7 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.7Bright
Planning a trip in May

Is May a good time to visit Rioja?

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

4.7
Sightseeing
6th-best month of the year
4.1
Beach & pool
6th-best month of the year

May is a reasonable time to visit Rioja for sightseeing.

What to pack for Rioja in May

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

In May, Rioja sees daytime highs around 24°C and nights near 15°C. Pack rain gear. Worth having: light clothes and sun protection. About 24 days see rain.

rain gearlight clothessun protection

UV index in Rioja in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rioja peaks around February 13 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 20 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 13UV 17Jul 20UV 11
UV index (midday)Level
Jan16Extreme
Feb17Extreme
Mar16Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct14Extreme
Nov13Extreme
Dec14Extreme

Air quality in Rioja 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 Rioja is worst in September — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (June, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodModerateGoodSep 1319 µg/m³Jun 118 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar12Moderate
Apr10Good
May8Good
Jun8Good
Jul9Good
Aug16Moderate
Sep20Moderate
Oct10Good
Nov11Good
Dec10Good
Location & terrain

Where is Rioja?

Rioja sits at 6.1°S, 77.2°W, 831 m above sea level, in Peru. The nearest listed city is Moyobamba, 21 km away.

YurimaguasBellavistaJuanjuíBagua GrandeLa Peca

Topography around Rioja

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rioja.

Within 3 km, the terrain around Rioja has only modest variations in elevation — a maximum elevation change of 57 m around an average of 829 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,549 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,807 m.

The land around Rioja is covered by trees (34%), grassland (28%) and cropland (24%) within 3 km, trees (64%) and grassland (22%) within 16 km, and trees (89%) within 80 km.

3 km
57 m
16 km
1,549 m
80 km
3,807 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Moyobamba 21 km · Chachapoyas 80 km · La Banda 103 km · Yurimaguas 117 km · Bellavista 128 km · Juanjuí 134 km · Bagua Grande 145 km · La Peca 149 km

Peru travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
220 V · 60 Hz
Prices
≈ 51% of US
price level, 2025
GDP per capita
$9,684
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
49%
of population, 2024
Homicide rate
8.6
per 100k, 2021
Road deaths
13.6
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 519
Religion
Catholic 76%Evangelical Christian 16%no religion 5%other religions 3%

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 Rioja (-6.0568°, -77.1665°, elevation 831 m), 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).