Best time to visit Selfoss

Re-score for me — drag the dial — every chart on the page recolours live for your heat limit 27°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.

Saved to this browser. Changes update the strips below.
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Day · avg daily high (?)
Night · avg overnight low (?)
UV index · On a typical day around midday, UV is about this (?)
12223211
On the sunniest 1 in 10 days, UV reaches this — and even higher
444
PM2.5 air quality · on a typical day (?)
222333333222
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
344456554333
July 4/10 feels 12°C · HCI 45/100
Day 14° · Night 9° 74% humidity 19 km/h wind 13 rain days (229h) 235h sun
Thermal 4
Sky 4
Rain 4
Wind 10

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.

Compare with another destination

Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.

Similar climatesReykjavik93% · Hofn89% · Husavik86%

Other destinations with the most-alike year-round climate to Selfoss (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Selfoss's. Based on the 2020-2024 climatology, not this year's actual weather.

Month-by-month

Month Temp °C Feels °C Rain days Rain h Rain h/day Humidity Wind km/h Sun h UV Interest Score
Jan -2–2 -3 18 285 15.8 75% 30 38 — Busy 2
Feb -2–3 -3 17 261 15.4 75% 28 71 — Quiet 2
Mar -1–4 -2 18 263 14.6 68% 26 137 1 Quiet 2
Apr 1–7 3 16 243 15.2 70% 22 163 2 Quiet 3
May 4–9 6 19 274 14.4 69% 22 217 2 Peak 3
Jun 7–12 9 16 247 15.4 73% 21 211 2 Quiet 4
Jul 9–14 12 13 229 17.6 74% 19 235 3 Quiet 4
Aug 9–14 11 16 252 15.8 76% 20 190 2 Quiet 4
Sep 6–11 7 17 265 15.6 77% 24 145 1 Quiet 3
Oct 3–7 3 15 219 14.6 78% 23 106 1 Quiet 3
Nov 1–5 0 17 222 13.1 78% 27 55 — Quiet 2
Dec -3–2 -4 14 218 15.6 73% 27 21 — Quiet 2

UV Index in Selfoss by Month

UV index in Selfoss peaks at 3 (low) in July, dropping to 0 (low) in January.

Best months in detail

July

4/10

9–14°C (feels 12°C) · 13 rain days (229h) · 235 sun hours · 74% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)

August

4/10

9–14°C (feels 11°C) · 16 rain days (252h) · 190 sun hours · 76% humidity · Quiet crowd · UV 2 (low)

June

4/10

7–12°C (feels 9°C) · 16 rain days (247h) · 211 sun hours · 73% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 4 (moderate)

Every month

Show the other 9 months in detail

January

2/10

-2–2°C (feels -3°C) · 18 rain days (285h) · 38 sun hours · 75% humidity · Busy crowd

February

2/10

-2–3°C (feels -3°C) · 17 rain days (261h) · 71 sun hours · 75% humidity · Quiet crowd

March

2/10

-1–4°C (feels -2°C) · 18 rain days (263h) · 137 sun hours · 68% humidity · Quiet crowd · UV 1 (low)

April

3/10

1–7°C (feels 3°C) · 16 rain days (243h) · 163 sun hours · 70% humidity · Quiet crowd · UV 2 (low)

May

3/10

4–9°C (feels 6°C) · 19 rain days (274h) · 217 sun hours · 69% humidity · Peak crowd · UV 2 (low) · sunniest 1 in 10 days reach 4 (moderate)

September

3/10

6–11°C (feels 7°C) · 17 rain days (265h) · 145 sun hours · 77% humidity · Quiet crowd · UV 1 (low)

October

3/10

3–7°C (feels 3°C) · 15 rain days (219h) · 106 sun hours · 78% humidity · Quiet crowd · UV 1 (low)

November

2/10

1–5°C (feels 0°C) · 17 rain days (222h) · 55 sun hours · 78% humidity · Quiet crowd

December

2/10

-3–2°C (feels -4°C) · 14 rain days (218h) · 21 sun hours · 73% humidity · Quiet crowd

Frequently asked questions about visiting Selfoss

When is the best time to visit Selfoss?

July is the highest-scoring month (4/10 on the Holiday Climate Index). Typical conditions: 9–14°C (13 rainy days). The top three months by score are July, August, June.

What is the worst time to visit Selfoss?

January is the lowest-scoring month (2/10). Typical conditions: -2–2°C (18 rainy days).

When are crowds lowest in Selfoss?

Search-interest seasonality (Google Trends 2021-2025) is lowest in February and peaks in May. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.

What is the UV index in Selfoss by month?

UV peaks at 3 (low) in July and is lowest in January at 0 (low). Monthly peak values: Jan —, Feb —, Mar 1, Apr 2, May 2, Jun 2, Jul 3, Aug 2, Sep 1, Oct 1, Nov —, Dec —.

What is the UV index in Selfoss in July?

July is the peak UV month in Selfoss, with a daily-peak UV index of 3 (low). Standard sun protection — sunglasses and light SPF — is recommended.

How high can UV get in Selfoss on the sunniest days?

Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. July is the worst case: typical days average UV 3 (low), but the top 10% of days reach UV 4 (moderate) — and even higher. Months where the sunniest days routinely exceed the typical reading: May, June, July. Plan sun protection for the worst case, not the average.