Climate guideThirty-year normals for Siero
Siero climate by month
Oceanic · CfbBest Jul–Sep
Annual mean14°day and night
Seasonal swing11°warmest vs coolest
Precipitation1,238 mm147 wet days a year
43.39° N, 5.66° WElevation 218 mUTC+1 · Central European Standard Time
When to goSiero · weather score
Best timeJul–Sep
October: high / low20° / 10°
iSummary
What the weather is like
Siero has an oceanic climate (Köppen Cfb): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 24° and nights 15°. January is the coolest month, with highs of 13° and lows of 4°. The difference between the warmest and the coolest month is about 11°.
About 1,238 mm of precipitation falls in an average year. November is the wettest month (144 mm, 17 wet days) and July the driest (56 mm, 8 wet days). Cloud cover ranges from 39% in September to 46% in May.
Compared with Madrid, the capital, Siero is 9.1° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 24° · August
- Coldest nights
- 4° · February
- Wettest month
- November
- Driest month
- July
- Clearest skies
- September · 39% cloud
- Longest day
- 15 h 23 min
- Shortest day
- 8 h 59 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 13° | 13° | 15° | 17° | 19° | 21° | 23° | 24° | 23° | 20° | 16° | 14° |
| Average low | 4° | 4° | 6° | 7° | 10° | 13° | 15° | 15° | 13° | 10° | 7° | 5° |
| Precipitation | 111 mm | 104 mm | 104 mm | 125 mm | 104 mm | 74 mm | 56 mm | 69 mm | 83 mm | 132 mm | 144 mm | 132 mm |
| Wet days (≥1 mm) | 16.2 | 13.2 | 13.4 | 13.8 | 12 | 9.8 | 7.5 | 8.9 | 8.8 | 12.8 | 16.8 | 13.8 |
| Cloud cover | 43% | 41% | 43% | 44% | 46% | 46% | 46% | 44% | 39% | 42% | 44% | 44% |
| Daylight | 9h 19 | 10h 31 | 11h 53 | 13h 24 | 14h 41 | 15h 23 | 15h 06 | 14h 00 | 12h 33 | 11h 05 | 9h 43 | 8h 59 |
| Month score | 35 | 40 | 49 | 55 | 65 | 70 | 76 | 73 | 76 | 65 | 48 | 39 |
ivMonth by month
Siero in every month
January35
13° / 4°
111 mm · 16.2 wet days
February40
13° / 4°
104 mm · 13.2 wet days
March49
15° / 6°
104 mm · 13.4 wet days
April55
17° / 7°
125 mm · 13.8 wet days
May65
19° / 10°
104 mm · 12 wet days
June70
21° / 13°
74 mm · 9.8 wet days
July76
23° / 15°
56 mm · 7.5 wet days
August73
24° / 15°
69 mm · 8.9 wet days
September76
23° / 13°
83 mm · 8.8 wet days
October65
20° / 10°
132 mm · 12.8 wet days
November48
16° / 7°
144 mm · 16.8 wet days
December39
14° / 5°
132 mm · 13.8 wet days