Avg High
Inverness in September
Avg Low
Rain
Daylight
13h
What to expect
In Inverness, September sits in early autumn, a shoulder-season month where the feel can shift as the season turns. Most days sit on the cooler side, with evenings that ease back comfortably. Comfort is usually predictable, so a standard day plan works well. Daylight is moderate, so steady pacing works well.
September in context
How it compares to the rest of the year in Inverness.
Hottest (avg)
#4 / 12
Wettest (avg)
#9 / 12
Daylight Hours
#6 / 12
Windiest (avg)
#8 / 12
Highest UV
#6 / 12
Most Humid
#6 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 12.8 h
- UV index (max)
- 5
- Typical sun hours
- 05:48 - 18:34
Rain & Snow
- Total rain
-
- Rainy days
- 16 days
- Cloud cover (avg)
- 77%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 81%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for September. Typical high 14.5°C and low 8.8°C.
Typical disruptions in September
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in September.
Cold High impact
Cold feels-like nights Measures: Cold feels-like nights (min <=5C). Observed about 25% of days (7.4 days/month) in September. Historical risk signal only, not a day-by-day forecast.
7.4 days / month
~25% of days
Why this matters
- Expected days 7.4 days / month
- Probability ~25% of days
- Intensity Up to ~5°C (P95)
Cold feels-like nights are possible on ~7 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Rain High impact
Rain disruption Measures: Likely rain disruption days. Observed about 17% of days (5.1 days/month) in September. Historical risk signal only, not a day-by-day forecast.
5.1 days / month
~17% of days
Why this matters
- Expected days 5.1 days / month
- Probability ~17% of days
- Intensity Up to ~19mm (P95)
Rain disruption risk appears on ~5 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 17% of days (5.0 days/month) in September. Historical risk signal only, not a day-by-day forecast.
5.0 days / month
~17% of days
Why this matters
- Expected days 5.0 days / month
- Probability ~17% of days
- Intensity Up to ~19mm (P95)
Washout conditions are possible on ~5 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind High impact
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 14% of days (4.2 days/month) in September. Historical risk signal only, not a day-by-day forecast.
4.2 days / month
~14% of days
Why this matters
- Expected days 4.2 days / month
- Probability ~14% of days
- Intensity Up to ~85km/h (P95)
Strong gusts are possible on ~4 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Wind High impact
Stormy conditions Measures: Storm-impact proxy days. Observed about 2% of days (0.7 days/month) in September. Historical risk signal only, not a day-by-day forecast.
0.7 days / month
~2% of days
Why this matters
- Expected days 0.7 days / month
- Probability ~2% of days
- Intensity Up to ~85km/h (P95)
Stormy conditions are possible on ~1 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain Moderate
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 6% of days (1.8 days/month) in September. Historical risk signal only, not a day-by-day forecast.
1.8 days / month
~6% of days
Why this matters
- Expected days 1.8 days / month
- Probability ~6% of days
- Intensity Up to ~22mm (P95)
Heavy rain is possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Show all disruptions (15 more)
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 0.9 days/month in September. Historical risk signal only, not a day-by-day forecast.
0.9 days / month
Probability unavailable
Why this matters
- Expected days 0.9 days / month
- Probability —
- Intensity Up to ~20mm (P95)
Multi-day washout runs are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind High impact
Severe gusts Measures: Severe gust days (>=80 km/h). Observed about 1% of days (0.4 days/month) in September. Historical risk signal only, not a day-by-day forecast.
0.4 days / month
~1% of days
Why this matters
- Expected days 0.4 days / month
- Probability ~1% of days
- Intensity Up to ~92km/h (P95)
Severe gusts are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Visibility Moderate
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 5% of days (1.4 days/month) in September. Historical risk signal only, not a day-by-day forecast.
1.4 days / month
~5% of days
Why this matters
- Expected days 1.4 days / month
- Probability ~5% of days
- Intensity Up to ~96% (P95)
Fog-likely conditions are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 83% of days (24.8 days/month) in September. Historical risk signal only, not a day-by-day forecast.
24.8 days / month
~83% of days
Why this matters
- Expected days 24.8 days / month
- Probability ~83% of days
- Intensity Up to ~100% (P95)
Cloudy skies are possible on ~25 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 63% of days (18.9 days/month) in September. Historical risk signal only, not a day-by-day forecast.
18.9 days / month
~63% of days
Why this matters
- Expected days 18.9 days / month
- Probability ~63% of days
- Intensity Up to ~14mm (P95)
Measurable rain is possible on ~19 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 58% of days (17.3 days/month) in September. Historical risk signal only, not a day-by-day forecast.
17.3 days / month
~58% of days
Why this matters
- Expected days 17.3 days / month
- Probability ~58% of days
- Intensity Up to ~93% (P95)
High humidity is possible on ~17 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 53% of days (15.8 days/month) in September. Historical risk signal only, not a day-by-day forecast.
15.8 days / month
~53% of days
Why this matters
- Expected days 15.8 days / month
- Probability ~53% of days
- Intensity Up to ~100% (P95)
Mostly cloudy skies are possible on ~16 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 51% of days (15.4 days/month) in September. Historical risk signal only, not a day-by-day forecast.
15.4 days / month
~51% of days
Why this matters
- Expected days 15.4 days / month
- Probability ~51% of days
- Intensity Up to ~19h (P95)
Several rainy hours are possible on ~15 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 49% of days (14.8 days/month) in September. Historical risk signal only, not a day-by-day forecast.
14.8 days / month
~49% of days
Why this matters
- Expected days 14.8 days / month
- Probability ~49% of days
- Intensity Up to ~75km/h (P95)
Gusty conditions are possible on ~15 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 38% of days (11.3 days/month) in September. Historical risk signal only, not a day-by-day forecast.
11.3 days / month
~38% of days
Why this matters
- Expected days 11.3 days / month
- Probability ~38% of days
- Intensity Up to ~20h (P95)
Wet-most-of-day conditions are possible on ~11 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 20% of days (6.0 days/month) in September. Historical risk signal only, not a day-by-day forecast.
6.0 days / month
~20% of days
Why this matters
- Expected days 6.0 days / month
- Probability ~20% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~6 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold Minor
Cold nights Measures: Cold nights (min <=5C). Observed about 5% of days (1.6 days/month) in September. Historical risk signal only, not a day-by-day forecast.
1.6 days / month
~5% of days
Why this matters
- Expected days 1.6 days / month
- Probability ~5% of days
- Intensity Up to ~5°C (P95)
Cold nights are possible on ~2 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Other Minor
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data Measures: Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data. Observed about 5% of days (1.4 days/month) in September. Historical risk signal only, not a day-by-day forecast.
1.4 days / month
~5% of days
Why this matters
- Expected days 1.4 days / month
- Probability ~5% of days
- Intensity Up to ~96 (P95)
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data is possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Wind Minor
Breezy days Measures: Breezy days (mean wind >=25 km/h). Observed about 2% of days (0.5 days/month) in September. Historical risk signal only, not a day-by-day forecast.
0.5 days / month
~2% of days
Why this matters
- Expected days 0.5 days / month
- Probability ~2% of days
- Intensity Up to ~30km/h (P95)
Breezy conditions are possible on ~1 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cold Minor
Cold days Measures: Cold days (max <=10C). Observed about 1% of days (0.4 days/month) in September. Historical risk signal only, not a day-by-day forecast.
0.4 days / month
~1% of days
Why this matters
- Expected days 0.4 days / month
- Probability ~1% of days
- Intensity Up to ~10°C (P95)
Cold daytime conditions are possible on ~0 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Frequently asked questions
Is September a good time to visit Inverness?
Typical September days in Inverness reach highs of 15°C (59°F) with nights around 9°C (48°F). It usually feels cool by day and cool after dark. Overall, September sits in the middle of the Inverness climate range.
What are temperatures like in September?
Daytime temperatures in September typically peak near 15°C (59°F), while nights drop to around 9°C (48°F). Expect cool afternoons and cool evenings.
How much does it rain in September?
Rainfall in September averages 73 mm (2.9 in) across roughly 16 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in September?
You can expect about 13 hours of daylight in September. Sunrise is typically around 05:48 and sunset near 18:34. Daylight is fairly typical, with enough time for sightseeing.
How strong is the sun in September?
UV levels are moderate (around 5); sunscreen and sunglasses are still a good idea.
Is it windy in September?
In September, average wind speeds are around 12 km/h (7 mph), with gusts on the windiest days reaching about 63 km/h (39 mph). On the ground, it is it is a notably windy place, and strong gusts are fairly common.