Monsanto weather in May

In May, Monsanto sees average daytime highs of 22°C and overnight lows near 12°C, with 72 mm of rain across 8.6 wet days and about 14.1 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 20°C in the first days to 23°C by the end. The sky is clear or mostly clear about 39% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 36 min by month's end. Set against the rest of the year, May is Monsanto's 5th-clearest and 4th-windiest month. For the whole year in context, see Monsanto's year-round climate.

Daytime high
22°
5th warmest
Overnight low
12°
7th coldest
Rainfall
72 mm
8.6 wet days
Daylight
14 h 12 min
5:26 AM – 7:36 PM
Cloud cover
50%
5th clearest
Wind
13 km/h
4th windiest
Solar energy
6.61 kWh/m²
Travel score
7.0
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 20°C in the first days to 23°C by the end.

A typical May day in Monsanto reaches about 22°C in the afternoon and slips back to 12°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 29°C. Set against its neighbours, May runs about 3°C warmer than April and about 3°C cooler than June.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12011
22011
32011
42011
52011
62011
72111
82111
92111
102111
112112
122112
132112
142212
152212
162212
172212
182212
192212
202212
212313
222313
232313
242313
252313
262313
272313
282313
292313
302413
312413

Monsanto weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan13° / 8610.29.53.9
Feb15° / 658.110.44.7
Mar18° / 739.211.75.9
Apr19° / 10°8010.5136.1
May22° / 12°728.614.17.0
Jun25° / 14°203.914.78.1
Jul27° / 16°61.814.58.3
Aug28° / 16°102.513.57.8
Sep26° / 15°455.712.37.8
Oct22° / 13°9910.1116.6
Nov17° / 97119.85.2
Dec14° / 919.99.34.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25347
35347
45347
55347
65248
75347
85347
95347
105347
115446
125446
135545
145545
155644
165644
175743
185842
195941
205941
215941
226040
236139
246139
256238
266238
276238
286238
296238
306238
316238

Chance of precipitation in May

Any precipitation

Monsanto gets around 72 mm of rain over 8.6 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 28% and peaks near 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
131
230
330
430
530
630
730
830
930
1030
1130
1229
1329
1429
1529
1629
1729
1828
1928
2028
2128
2227
2327
2426
2526
2625
2724
2824
2923
3022
3122

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 75% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
186140
286140
385150
485150
584160
684160
783170
883170
982180
1081190
1181190
1280200
1379210
1477221
1576231
1676231
1775241
1874251
1973261
2072262
2171272
2269283
2368293
2468293
2566304
2665314
2765314
2863325
2962335
3062335
3161345

Wind in May

Winds average 13 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:43 AM to 5:16 AM, and sunset from 7:21 PM to 7:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.65:437:21
213.75:427:22
313.75:407:23
413.85:397:24
513.85:387:25
613.85:377:26
713.95:367:27
813.95:347:28
913.95:337:29
1014.05:327:30
1114.05:317:31
1214.05:307:32
1314.15:297:33
1414.15:287:34
1514.15:277:35
1614.25:267:36
1714.25:257:37
1814.25:257:38
1914.35:247:39
2014.35:237:40
2114.35:227:40
2214.35:217:41
2314.45:217:42
2414.45:207:43
2514.45:197:44
2614.45:197:45
2714.55:187:46
2814.55:177:46
2914.55:177:47
3014.55:167:48
3114.65:167:49

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.61 kWh/m².

For context, solar energy here swings from a low near 1.93 kWh/m² to a high of 7.53 kWh/m² in July across the year — May's 6.61 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.4Intense
96.4Intense
106.4Intense
116.5Intense
126.5Intense
136.5Intense
146.6Intense
156.6Intense
166.6Intense
176.7Intense
186.7Intense
196.7Intense
206.8Intense
216.8Intense
226.8Intense
236.8Intense
246.8Intense
256.9Intense
266.9Intense
276.9Intense
286.9Intense
297.0Intense
307.0Intense
317.0Intense
Planning a trip in May

Hazard calendar for Monsanto

In seasonPeak

In May, Monsanto sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Monsanto's rainy season runs September–May, when most of the year's rain falls.

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

Is May a good time to visit Monsanto?

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

7.0
Sightseeing
5th-best month of the year
4.8
Beach & pool
5th-best month of the year

May is one of the better times to visit Monsanto for general sightseeing.

What to pack for Monsanto in May

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

In May, Monsanto sees daytime highs around 22°C and nights near 12°C. Pack sun protection. Worth having: rain gear. About 9 days see rain.

sun protectionrain gear

Sea temperature near Monsanto in May

The nearest coast averages about 16°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 40 km away) is warmest in August at about 19°C and coldest in February near 14°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

12°14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May16Cool
Jun18Cool
Jul18Cool
Aug19Cool
Sep19Cool
Oct18Cool
Nov17Cool
Dec15Cool

UV index in Monsanto in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Monsanto peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 14UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr7Very high
May7High
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Monsanto?

Monsanto sits at 39.5°N, 8.7°W, 143 m above sea level, in Portugal. The nearest listed city is Torres Novas, 15 km away.

Topography around Monsanto

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

Within 3 km, the terrain around Monsanto has significant variations in elevation — a maximum elevation change of 312 m around an average of 152 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 668 m; within 80 km, large variations in elevation — a maximum elevation change of 1,078 m.

The land around Monsanto is covered by trees (57%) and grassland (29%) within 3 km, trees (45%) and grassland (39%) within 16 km, and trees (42%) and grassland (29%) within 80 km.

3 km
312 m
16 km
668 m
80 km
1,078 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Torres Novas 15 km · Entroncamento 21 km · Alcobaça 25 km · Santarém 25 km · Tomar 30 km · Leiria 32 km · Marinha Grande 37 km · Caldas da Rainha 37 km

Portugal travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$32,082
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2022
Road deaths
8.2
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 612
Religion
Catholic 68%not applicable 13%no religion 12%no response 2%

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 Monsanto (39.462°, -8.7118°, elevation 143 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).