Climate and average weather in Monsanto

In Monsanto, the summers are hot, dry, and clear and the winters are cool and partly cloudy.

Best: mid May to mid October

Over the course of the year, the temperature in Monsanto typically varies from 6°C to 28°C, and is rarely below 1°C or above 36°C. August is the hottest month of the year, while January is the coldest.

Based on the travel score, the best time of year to visit Monsanto for warm-weather activities is from mid May to mid October.

Hottest
Aug
28°
Coldest
Jan
Wettest
Oct
99 mm
Driest
Jul
6 mm
Rain / yr
743 mm
92 wet days
Daylight
9.2–14.8 h
shortest–longest
Elevation
143 m
39.5°N
Clearest
Jul
21% cloud

Monsanto weather by month, at a glance

The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.

Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around mid May to mid October.

Temperature through the year

Average highAverage lowShaded bands: 10–90% of days

Daily average highs and lows in Monsanto, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.

The hot season lasts 3.5 months, from June 10 to September 23, with daily high temperatures above 25°C. The hottest month of the year in Monsanto is August, with an average high of 28°C and low of 16°C.

The cool season lasts 3.5 months, from November 18 to March 4, with daily high temperatures below 16°C. The coldest month of the year in Monsanto is January, with an average low of 6°C and high of 13°C.

Days typically run about 9°C warmer than nights, with the widest day–night swing (around 12°C) in August.

10°20°30°40°JanFebMarAprMayJunJulAugSepOctNovDec
Avg high (°C)Avg low (°C)
Jan136
Feb157
Mar188
Apr1910
May2212
Jun2514
Jul2716
Aug2816
Sep2615
Oct2213
Nov179
Dec147

Average hourly temperature in Monsanto

A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on August afternoons, near 28°C, and coldest before dawn in January, near C.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM

Monsanto weather by month

Every month at a glance. Click a month for its detailed page.

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

Chance of rain

How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.

Monsanto gets about 743 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.

The wetter season lasts 7.8 months, from around Oct 2 to May 25, peaking in October at about 38% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 22.

October is the wettest month by volume, with 99 mm over about 10 wet days; July is the driest, with 6 mm.

0%10%20%30%40%50%JanFebMarAprMayJunJulAugSepOctNovDecwetterdrierwettermostly drysome rainoften wetvery wetOct 26 · 38%Jul 22 · 5%
Rain on a day (%)Rain days
Jan3310
Feb298
Mar309
Apr3411
May289
Jun144
Jul62
Aug83
Sep186
Oct3310
Nov3511
Dec3310

Monthly rainfall

Over a full year, Monsanto collects about 743 mm of rain across 92 wet days — roughly 62 mm in an average month.

It doesn’t fall evenly. October is the wettest month with 99 mm, while July is the driest at just 6 mm. The three wettest months alone bring about 39% of the year’s total.

0255075100125JanFebMarAprMayJunJulAugSepOctNovDec86657380722061045999791
Rainfall (mm)Rain days
Jan8610
Feb658
Mar739
Apr8011
May729
Jun204
Jul62
Aug103
Sep456
Oct9910
Nov9711
Dec9110

Clouds and sunshine

ClearMostly clearPartly cloudyMostly cloudyOvercast

How often the daytime sky is clear, partly cloudy or overcast.

In Monsanto, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.

The clearer part of the year begins around May 24 and lasts for 4.5 months, ending around October 7. The clearest month is August, when the sky is clear, mostly clear, or partly cloudy 87% of the time on average.

The cloudier part of the year begins around October 8 and lasts for 7.5 months, ending around May 23. The cloudiest month is December, when it is overcast or mostly cloudy 55% of the time.

0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%JanFebMarAprMayJunJulAugSepOctNovDecJul 30 · 89%Nov 1 · 44%clearmostly clearpartly cloudymostly cloudyovercastcloudierclearercloudier
Clearer (%)Cloudier (%)
Jan4951
Feb4852
Mar5149
Apr5149
May5743
Jun7228
Jul8713
Aug8713
Sep7327
Oct5347
Nov4852
Dec4555

Daylight, sunrise and sunset

DaylightNight

Hours of daylight through the year, with sunrise and sunset times.

The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 14, brings about 14 h 48 min of light; the shortest, around December 14, only 9 h 12 min — a swing of roughly 5 h 36 min.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDec
Daylight (h)Sunrise (AM)Sunset (PM)
Jan9.57:595:29
Feb10.47:366:03
Mar11.76:546:35
Apr13.06:047:06
May14.15:267:36
Jun14.75:127:58
Jul14.55:257:56
Aug13.55:527:26
Sep12.36:226:37
Oct11.06:525:48
Nov9.87:265:14
Dec9.37:545:08

Sunny days

How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.

Monsanto averages about 14 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 25 days.

The sunnier stretch runs 4.0 months, from around Jun 6 to Oct 5. The sunniest month is July, with roughly 23 sunny days (brilliant).

The greyest month is October, down near 11 sunny days — about 52% fewer than the July peak.

051015202530JanFebMarAprMayJunJulAugSepOctNovDecgreyersunniergreyergloomymixedbrightbrilliantJul 2725 daysOct 299 days
Sunny daysSky
Jan11Mixed
Feb10Mixed
Mar11Mixed
Apr10Mixed
May12Mixed
Jun16Bright
Jul24Brilliant
Aug23Bright
Sep17Bright
Oct12Mixed
Nov10Mixed
Dec11Mixed

Humidity comfort

DryComfortableHumidMuggyOppressiveMiserable

Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.

Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.

In Monsanto, how humid it feels changes noticeably over the year.

The more humid part of the year lasts 4.7 months, from around June 13 to November 2. The muggiest month is August, when the air feels humid, muggy or worse about 28% of the time.

The most comfortable stretch runs from around November 3 to June 12, and January is the most comfortable month — the air is dry or comfortable 100% of the time.

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 1 · 100%Aug 20 · 71%humiddrycomfortablecomfortablehumidcomfortable
Dry (%)Comfortable (%)Humid (%)Muggy (%)
Jan96400
Feb98200
Mar97300
Apr92800
May752420
Jun444790
Jul2159200
Aug1953271
Sep3145231
Oct5333131
Nov831430
Dec94600

Wind

Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.

This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.

Across the year, average wind speed in Monsanto is typically light breeze, near 13 km/h, and varies little with the seasons.

The windier part of the year lasts 5.3 months, from around Mar 18 to Aug 25. The windiest month is July, averaging about 15 km/h (light breeze).

The calmer part of the year runs from around Aug 26 to Feb 22, with October the calmest month at about 12 km/h.

05101520JanFebMarAprMayJunJulAugSepOctNovDeccalmerwindiercalmercalmlight breezeJul 7 · 15 km/hOct 10 · 11 km/h
Wind speed (km/h)Feels
Jan12light breeze
Feb13light breeze
Mar13light breeze
Apr13light breeze
May13light breeze
Jun14light breeze
Jul15light breeze
Aug14light breeze
Sep12calm
Oct12calm
Nov12calm
Dec12light breeze

Hazard calendar for Monsanto

In seasonPeak

When the seasonal hazards worth planning around — the rainy season, tropical-cyclone risk and dust haze — are active through the year.

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

Best time to visit Monsanto

TravelBeach/poolTemperatureCloudsPrecipitation

To characterize how pleasant the weather is in Monsanto throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.

Around early October, Monsanto is still near the tail of its best-weather window — great conditions with the peak-season crowds already thinning.

Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.

The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best time of year to visit Monsanto for general outdoor tourist activities is from mid May to mid October, with a peak score in the first week of July.

0246810JanFebMarAprMayJunJulAugSepOctNovDecbest timetravel scoretemperaturecloudsprecipitationJul 5 · 8.4

The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Travel score (0–10)Rating
Jan3.9fair
Feb4.7fair
Mar5.9good
Apr6.1good
May7.0good
Jun8.1ideal
Jul8.3ideal
Aug7.8ideal
Sep7.8ideal
Oct6.6good
Nov5.2fair
Dec4.1fair

The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit Monsanto for hot-weather activities is from mid June to mid September, with a peak score in the last week of July.

024681012JanFebMarAprMayJunJulAugSepOctNovDecbest timebeach/pool scoretemperaturecloudsprecipitationJul 30 · 8.9

The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

What to pack for Monsanto, by month

EssentialRecommendedOptional

Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.

For a warm-season trip around August (highs near 28°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 13°C), pack a warm layer and rain gear.

Light clothing
Warm layer
Winter coat
Rain gear
Sun protection
Windbreaker

In August, Monsanto sees daytime highs around 28°C and nights near 16°C. Pack light clothes and sun protection.

Sea temperature near Monsanto

Average ocean temperature at the nearest coast, month by month, banded into swim-comfort zones — the other half of the beach question.

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 (midday) in Monsanto by month

LowModerateHighVery highExtreme

Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.

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

Average hourly UV index in Monsanto

LowModerateHighVery highExtreme

Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.

The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.

UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 5.5 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.

JanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM
UV ≥ 3 (h/day)UV ≥ 6 (h/day)
Jan00
Feb00
Mar5.50
Apr73.5
May7.53.5
Jun8.55
Jul8.55.5
Aug7.54.5
Sep60
Oct4.50
Nov00
Dec00
Almanac & agriculture

Growing season

Chance of a frost-free day

Monsanto is mild enough that a frost-free day stays more likely than not even in midwinter.

0%25%50%75%100%JanFebMarAprMayJunJulAugSepOctNovDec
Frost-free chance (%)Frost nights
Jan950
Feb990
Mar1000
Apr1000
May1000
Jun1000
Jul1000
Aug1000
Sep1000
Oct1000
Nov1000
Dec980

Growing degree days

Degree days (base 10°C)

Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. Monsanto banks about 2,114 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around August.

05001,0001,5002,000JanFebMarAprMayJunJulAugSepOctNovDec
Growing degree days (°C·days)
Jan0
Feb19
Mar92
Apr131
May213
Jun293
Jul360
Aug374
Sep311
Oct222
Nov87
Dec14

Solar energy

Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.

Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.

Monsanto receives about 4.7 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.9 and 7.6 kWh/m².

The brighter stretch of the year lasts 6.1 months, from around Mar 21 to Sep 22. The brightest month is July, averaging about 7.5 kWh/m² (intense).

The dimmest month is December, down near 2.0 kWh/m² — roughly 74% less than the July peak.

0123456789JanFebMarAprMayJunJulAugSepOctNovDecdimmerbrighterdimmerdimmoderatebrightintenseJul 97.6 kWhDec 231.9 kWh
Solar energy (kWh/m²)Level
Jan2.2Moderate
Feb3.2Moderate
Mar4.5Bright
Apr5.6Bright
May6.6Intense
Jun7.3Intense
Jul7.5Intense
Aug6.7Intense
Sep5.2Bright
Oct3.5Moderate
Nov2.4Moderate
Dec1.9Dim

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
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).