Climate Insights for Nelas

Nelas, Distrito de Viseu, Portugal

Hottest
August
29°C peak
Coldest
January
4°C low
Wettest
October
141mm rain
Best to Visit
May, June, July
Mild temps & low rain

Climate Overview

The climate in Nelas is temperate. The average annual temperature is 15°C and approximately 970mm of precipitation falls per year. October is the wettest month, receiving around 141mm of rainfall. Nelas is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, December, when temperatures can drop to 4°C.

Temperature

10° 15° 20° 25° 30° Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Max: 12° Average: 8° Min: 4° Feb Max: 14° Average: 9° Min: 5° Mar Max: 16° Average: 11° Min: 7° Apr Max: 18° Average: 13° Min: 9° May Max: 22° Average: 16° Min: 11° Jun Max: 24° Average: 19° Min: 14° Jul Max: 29° Average: 22° Min: 16° Aug Max: 29° Average: 22° Min: 16° Sep Max: 25° Average: 19° Min: 14° Oct Max: 21° Average: 16° Min: 12° Nov Max: 16° Average: 11° Min: 8° Dec Max: 13° Average: 9° Min: 6°
Max
Average
Min

Temperatures in Nelas vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 29°C and the mean temperature sits around 22°C. January is the coolest month, with minimum temperatures around 4°C and an average of 8°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 5°C shift in average temperatures.

Precipitation

0mm 25mm 50mm 75mm 100mm 125mm 150mm Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Precipitation: 113mm Feb Precipitation: 95mm Mar Precipitation: 115mm Apr Precipitation: 108mm May Precipitation: 59mm Jun Precipitation: 35mm Jul Precipitation: 7mm Aug Precipitation: 7mm Sep Precipitation: 48mm Oct Precipitation: 141mm Nov Precipitation: 122mm Dec Precipitation: 120mm
Precipitation

Nelas is a moderately rainy area, receiving approximately 970mm of precipitation annually, which averages out to around 81mm per month. The wettest month is October, averaging 141mm of rainfall. November and December also tend to see above-average precipitation. The driest month is July, with just 7mm. That's 134mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Wind

0km/h 5km/h 10km/h 15km/h 20km/h Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Wind Speed: 15km/h Feb Wind Speed: 16km/h Mar Wind Speed: 17km/h Apr Wind Speed: 16km/h May Wind Speed: 16km/h Jun Wind Speed: 15km/h Jul Wind Speed: 15km/h Aug Wind Speed: 16km/h Sep Wind Speed: 14km/h Oct Wind Speed: 15km/h Nov Wind Speed: 15km/h Dec Wind Speed: 15km/h
Wind Speed

Nelas is mildly breezy, with an average annual wind speed of 15km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

Seasons

Winter
Dec 21
Spring
Mar 20
Summer
Jun 21
Autumn
Sep 23

89 days until Summer

It is currently spring in Nelas, which began on March 20, 2026. Nelas is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 29°C, while the coldest stretch bottoms out in January near 4°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

Spring

Temperatures range from 7 to 22°C. Precipitation is moderate at around 282mm for the season, averaging 94mm per month. Winds are moderate at around 16km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.

Summer

Temperatures range from 14 to 29°C. Rainfall is relatively light, with around 49mm over the season and a monthly average of 16mm. Winds are moderate at around 15km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.

Autumn

Temperatures range from 8 to 25°C. Rainfall is heavy, totalling around 311mm across the season with a monthly average of 104mm. Winds are generally light, averaging 15km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.

Winter

Temperatures range from 4 to 14°C. Rainfall is heavy, totalling around 328mm across the season with a monthly average of 109mm. Winds are moderate at around 15km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.

Best Time to Visit

Jan
Feb
Mar 11°
Apr 13°
May 16°
Jun 19°
Jul 22°
Aug 22°
Sep 19°
Oct 16°
Nov 11°
Dec

The best time to visit Nelas is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 31mm per month. By contrast, January can be quite cold with temperatures dropping to 4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

Monthly Climate Data

The table below shows monthly climate averages for Nelas based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.

Month
Min Temperature
Max Temperature
Wind Speed
Precipitation
Snow
Jan
4 °C
12 °C
15 km/h
113 mm
0 cm
Feb
5 °C
14 °C
16 km/h
95 mm
0 cm
Mar Current
7 °C
16 °C
17 km/h
115 mm
0 cm
Apr
9 °C
18 °C
16 km/h
108 mm
0 cm
May
11 °C
22 °C
16 km/h
59 mm
0 cm
Jun
14 °C
24 °C
15 km/h
35 mm
0 cm
Jul
16 °C
29 °C
15 km/h
7 mm
0 cm
Aug
16 °C
29 °C
16 km/h
7 mm
0 cm
Sep
14 °C
25 °C
14 km/h
48 mm
0 cm
Oct
12 °C
21 °C
15 km/h
141 mm
0 cm
Nov
8 °C
16 °C
15 km/h
122 mm
0 cm
Dec
6 °C
13 °C
15 km/h
120 mm
0 cm
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Metric (°C, km/h)