Tornio · July 2027
Northern lights in Tornio in July 2027
Answer
July against the rest of the year
July cloud at Tornio averages 66% in NASA POWER's 2001 to 2020 record, 8 points clearer than its yearly mean. No month at Tornio is clearer. By civil night times clear sky, July scores 0.0 hours at Tornio, 10th of 12. Kemi, 23 km away, averages the same 66%.
The sun never gets 6 degrees below the horizon at Tornio in July 2027, so every night is twilight or daylight. Darkness returns in August: 4.5 hours of civil night by the 15th.
July night by night
The moon runs its cycle as usual, new on Jul 4 and full on Jul 18, but with no civil night it makes no difference at Tornio in July.
- 1
7% lit
no night
- 2
2% lit
no night
- 3
0% lit
no night
- 4
1% lit
no night
- 5
5% lit
no night
- 6
11% lit
no night
- 7
20% lit
no night
- 8
30% lit
no night
- 9
40% lit
no night
- 10
51% lit
no night
- 11
62% lit
no night
- 12
71% lit
no night
- 13
80% lit
no night
- 14
87% lit
no night
- 15
93% lit
no night
- 16
97% lit
no night
- 17
99% lit
no night
- 18
100% lit
no night
- 19
99% lit
no night
- 20
96% lit
no night
- 21
91% lit
no night
- 22
85% lit
no night
- 23
77% lit
no night
- 24
68% lit
no night
- 25
59% lit
no night
- 26
48% lit
no night
- 27
38% lit
no night
- 28
27% lit
no night
- 29
18% lit
no night
- 30
10% lit
no night
- 31
4% lit
no night
Each cell is the night that starts on that date. Hours are civil-dark time with the moon below the horizon; the green rule scales with them. Green outline: new moon. Bone outline: full moon.
Activity in past Julys
Tornio needs Kp 2 for the average oval edge to sit overhead. 661 of the 930 July days from 1996 to 2025 (71%) reached it in the GFZ Potsdam record, one of the three quietest months for that level; storm days with Kp 5 or more made up 9%. Tornio sits at 63.2 degrees geomagnetic, inside SWPC's 60 to 75 degree band, where aurora can be seen on more than half of all nights. No storm is needed: by SWPC's rule the average oval edge is overhead at Kp 2.
July across Finland
Tornio ranks 7th in Finland for civil night on July 15, behind Helsinki at 2.9 hours. Coming from June (0.0 hours at Tornio), July changes little, and the nights keep growing into August (4.5 hours on the 15th).
Darkness and moon, every night
| Night | Civil | Astronomical | Moon-free dark | Moon-free, 10 PM to 2 AM | Moon lit |
|---|---|---|---|---|---|
| Thu Jul 1 | 0 min | 0 min | 0 min | 0 min | 7% |
| Fri Jul 2 | 0 min | 0 min | 0 min | 0 min | 2% |
| Sat Jul 3 | 0 min | 0 min | 0 min | 0 min | 0% |
| Sun Jul 4 | 0 min | 0 min | 0 min | 0 min | 1% |
| Mon Jul 5 | 0 min | 0 min | 0 min | 0 min | 5% |
| Tue Jul 6 | 0 min | 0 min | 0 min | 0 min | 11% |
| Wed Jul 7 | 0 min | 0 min | 0 min | 0 min | 20% |
| Thu Jul 8 | 0 min | 0 min | 0 min | 0 min | 30% |
| Fri Jul 9 | 0 min | 0 min | 0 min | 0 min | 40% |
| Sat Jul 10 | 0 min | 0 min | 0 min | 0 min | 51% |
| Sun Jul 11 | 0 min | 0 min | 0 min | 0 min | 62% |
| Mon Jul 12 | 0 min | 0 min | 0 min | 0 min | 71% |
| Tue Jul 13 | 0 min | 0 min | 0 min | 0 min | 80% |
| Wed Jul 14 | 0 min | 0 min | 0 min | 0 min | 87% |
| Thu Jul 15 | 0 min | 0 min | 0 min | 0 min | 93% |
| Fri Jul 16 | 0 min | 0 min | 0 min | 0 min | 97% |
| Sat Jul 17 | 0 min | 0 min | 0 min | 0 min | 99% |
| Sun Jul 18 | 0 min | 0 min | 0 min | 0 min | 100% |
| Mon Jul 19 | 0 min | 0 min | 0 min | 0 min | 99% |
| Tue Jul 20 | 0 min | 0 min | 0 min | 0 min | 96% |
| Wed Jul 21 | 0 min | 0 min | 0 min | 0 min | 91% |
| Thu Jul 22 | 0 min | 0 min | 0 min | 0 min | 85% |
| Fri Jul 23 | 0 min | 0 min | 0 min | 0 min | 77% |
| Sat Jul 24 | 0 min | 0 min | 0 min | 0 min | 68% |
| Sun Jul 25 | 0 min | 0 min | 0 min | 0 min | 59% |
| Mon Jul 26 | 0 min | 0 min | 0 min | 0 min | 48% |
| Tue Jul 27 | 0 min | 0 min | 0 min | 0 min | 38% |
| Wed Jul 28 | 0 min | 0 min | 0 min | 0 min | 27% |
| Thu Jul 29 | 0 min | 0 min | 0 min | 0 min | 18% |
| Fri Jul 30 | 0 min | 0 min | 0 min | 0 min | 10% |
| Sat Jul 31 | 0 min | 0 min | 0 min | 0 min | 4% |
Questions
- Can you see the northern lights in Tornio in July?
- Not in July 2027. The sun stays above -6 degrees every night at Tornio, so there is no civil darkness.
- How dark is Tornio in July?
- Tornio averages 0.0 hours of civil night a night in July 2027, from 0 min on the 1st to 0 min on the last night.
- How cloudy is Tornio in July?
- NASA POWER's 2001 to 2020 climatology gives Tornio's 1 degree cell 66% mean cloud in July, against 74% for the whole year. It is an all-hours average, not a forecast.
- What is the best night in July 2027 for aurora in Tornio?
- No night in July 2027 has moon-free darkness inside 10 PM to 2 AM at Tornio.
- Is July or August better in Tornio?
- By civil night times the clear share, July scores 0.0 hours at Tornio and August 1.4. August comes out ahead.
Sources and verification
- SunCalchttps://github.com/mourner/suncalc
- NASA POWER climatologyhttps://power.larc.nasa.gov/docs/services/api/temporal/climatology/
- GFZ Potsdam Kp indexhttps://kp.gfz.de/en/data
- NOAA SWPC, Tips on viewing the aurorahttps://www.spaceweather.gov/content/tips-viewing-aurora
Quoted figures last checked against their sources on 2026-09-30; next review 2026-12-31. Computed figures come from SunCalc and the IGRF-14 dipole as described in the methodology. Every quote is listed in the sources ledger.