Tallinn in July is peak Nordic-Baltic summer — 22°C / 72°F afternoons, 13°C / 55°F mornings, 9 rain days. Tallinn Maritime Days mid-July; sauna + Baltic-sea-swim peak.
Tallinn in July is Nordic-Baltic peak summer. Estonian Weather Service (Riigi Ilmateenistus) Tallinn-Harku data put afternoon highs at 22°C / 72°F and overnight lows at 13°C / 55°F with 9 rain days. UV index 5-6, humidity 75%. Daylight 17h 50m. The 9°C / 16°F daily swing demands layered cotton + light wool-blend. The dressing register stays Estonian-Nordic-minimalist with the heritage Hanseatic UNESCO Old Town anchor. Reet Aus (Tallinn 1995, Telliskivi flagship), Tanel Veenre jewelry (Old Town Pikk 21), Marimekko-import (Solaris shopping centre Tallinn flagship), the heritage Estonian wool-knit Muhu + Kihnu sweaters at Müürivahe street market. Tallinn Maritime Days (Tallinna Merepäevad — the heritage Tallinn harbor maritime festival, mid-July, recognized Tallinn-summer harbor event with the heritage Estonian-naval-history programming + ship visits + the heritage Estonian-folk-music + maritime food). The recognized Tallinn sauna + Baltic-sea-swim culture at peak — Iglupark + Kalma Saun + Sompasauna-equivalent + Bath House Tallinn are the recognized destinations. Estonian dinner 17:30-21:30.
Tallinn July is peak Nordic-Baltic summer — daylight 17h 50m, Tallinn Maritime Days at the heritage Tallinn harbor mid-July, the heritage Iglupark + Kalma Saun sauna at peak season, the Reet Aus Telliskivi flagship at peak summer collection. Light wool sweater + leather sneakers + rain shell + Tanel Veenre jewelry.

Estonian Weather Service Tallinn-Harku logs 22°C / 72°F afternoons through July with 9 rain days and 75% humidity. Cotton tee in cream, navy, or stone for the daily Old Town walk; light wool-blend or merino in oat or charcoal for the 13°C / 55°F mornings + cool late-evening. The heritage Estonian Muhu or Kihnu wool-knit (Müürivahe street market) is the recognized heritage Tallinn transitional layer.

Daily wear at the Town Hall Square, Toompea Castle, Alexander Nevsky Cathedral, the Kalamaja waterfront, Telliskivi Creative City. Tailored wool-blend trousers in charcoal or navy for the Restaurant 180° (2-Michelin) reservation; dark denim (Levi's 501 + Filippa K Stockholm-import) for the Telliskivi + Kalamaja shopping. Skip white trousers — Old Town cobble dust + Atlantic-Baltic damp.

Tallinn Old Town cobblestones unchanged from June. Leather sneakers from Common Projects, Veja, the heritage Finnish Sasta (founded 1973), or the heritage Estonian Sangar in cognac or stone. Skip stilettos absolutely; skip pure summer sandals — Atlantic-Baltic 13°C / 55°F mornings demand closed-toe.

Estonian Weather Service Tallinn-Harku logs 9 rain days through July with brief Atlantic-Baltic showers. Pack a packable rain shell — Stutterheim, Halti, Patagonia Houdini for lighter days. Skip umbrellas — Atlantic-Baltic wind defeats them.

Estonian Weather Service logs 13°C / 55°F overnight lows through July. The Atlantic-Baltic late-evening cool drops to 15-17°C / 59-63°F by midnight. Cotton or merino in ivory, navy, or stone layers under the cotton tee for the heritage Tallinn sauna + sea-swim post-evening + the recognized Restaurant 180° or NOA 19:00 dinner.

Reet Aus (Tallinn upcycled couture since 1995, flagship at Telliskivi 60a/3) and Tanel Veenre (the heritage Estonian art jeweler, flagship at the heritage Tallinn Old Town Pikk 21) at peak summer collection. Marimekko-import (Marimekko Helsinki has a Tallinn flagship at the heritage Solaris shopping centre) provides the heritage Marimekko Unikko + Tasaraita pieces. The heritage Müürivahe street wool-sweater wall sells the heritage Estonian wool-knit Muhu + Kihnu island sweaters ($60-200).

Tallinn Old Town cobble + Toompea hill + Telliskivi + Kalamaja + the heritage Tallinn sauna + sea-swim daily demand hands-free. Leather crossbody from the heritage Estonian Madre Made, Reet Aus (upcycled leather), or Marimekko. Pack swim + sauna towel + flip-flops + water bottle for Iglupark (€25-50, 1-2 day-ahead booking) or Kalma Saun (€15, no booking) or Bath House Tallinn.

Estonian Weather Service logs 13°C / 55°F mornings + 15-17°C / 59-63°F late-evening; Tallinn Maritime Days harbor venues drop to 14-16°C / 57-61°F evening cool. Pack a light insulated layer for outdoor evenings.
Cotton tee + light wool-blend layer · tailored trousers or dark denim · leather sneakers · packable rain shell · sunglasses · crossbody · water bottle. Reval Café coffee 8:30am, Town Hall Square (Raekoja plats) 9:30am, Toompea + Alexander Nevsky Cathedral 11:00am.
Tailored trousers · cotton button-down + Reet Aus piece + Tanel Veenre jewelry · cardigan + packable down jacket · leather sneakers · crossbody. Dinner at Restaurant 180° or NOA 19:00; Tallinn Maritime Days harbor venue mid-July or Iglupark midnight-sauna + Baltic-sea-swim after 21:00.
A suggested look — printed cotton dress over white tee, lavender cardigan worn as the only layer, white leather sneakers, amber sunglasses; no bag, no backpack.
Per Estonian Weather Service (Riigi Ilmateenistus) Tallinn-Harku data: average daily high 22°C (72°F), low 13°C (55°F), 9 rain days totalling 84mm. Peak Nordic-Baltic summer. UV index 5-6. Daylight 17h 50m. Humidity 75%. The 9°C / 16°F diurnal swing holds; Atlantic-Baltic late-evening cool drops to 15-17°C / 59-63°F by midnight. Slightly cooler than Stockholm + Copenhagen summer averages by 1-2°C; warmer than Helsinki summer by 1°C.
Tallinn Maritime Days (Tallinna Merepäevad — the heritage Tallinn-harbor maritime festival, mid-July, recognized Tallinn-summer harbor event since 2010 — attendance 200,000+ across 3 days) brings the heritage Estonian-naval-history programming to the Tallinn harbor + Old Town. Programming: heritage Estonian-naval-ship visits (the heritage Tallinn Maritime Museum + the heritage Estonian Coast Guard ship displays); the heritage Estonian-Maritime food (the heritage Tallinn-Baltic-Sea fish + the recognized Estonian-craft-beer); the heritage Estonian-folk-music + harbor concerts; the heritage Estonian-Maritime Museum special-exhibitions; the heritage Tallinn Maritime Days harbor walk (the recognized Tallinn-harbor Old Town water-front walk). Free entry; ship-visit tickets €5-15. Pack: layered cotton + wool sweater + tailored trousers + leather sneakers + cardigan + packable down jacket + Reet Aus piece + crossbody + camera. Tallinn Maritime Days runs 11:00-23:00 across 3 days mid-July.
Yes — the heritage Helsinki-Tallinn ferry route (the recognized Baltic-Sea-crossing 80km / 50 miles, 2 hours, daily) is the most-cited Tallinn day-trip option. Tallink (the heritage Estonian-Finnish ferry operator, Megastar + MyStar fast-ferries, 2 hours each way, €25-45 round-trip — the most-cited Helsinki-Tallinn route); Eckerö Line (€20-40 round-trip); Viking Line (€25-45 round-trip); Linda Line (smaller hydrofoil, 90 minutes, €30-50). Strategy: day-trip from Tallinn (08:00 Tallinn-Helsinki ferry, 18:00 return) for the heritage Helsinki Cathedral + Esplanadi + Marimekko Esplanadi flagship visit + lunch at the heritage Helsinki Old Market Hall; or longer-stay (2-3 nights Helsinki + 2-3 nights Tallinn) for the heritage Nordic-Baltic-twin-cities visit. Pack: layered cotton + wool sweater + leather sneakers + warm rain shell + cardigan + crossbody + Helsinki-Tallinn euro cash + camera. Skip the ferry without booking 2-4 weeks ahead in May-September peak.
The Müürivahe street wool-sweater wall (the heritage open-air market on the heritage Müürivahe street section between Viru Gate and the Town Wall, the recognized Tallinn Old Town wool-sweater + Estonian-craft destination — open-air market since the 1990s, also called 'Sweater Wall' or 'Wool Wall') is the heritage Tallinn shopping institution for the heritage Estonian wool-knit Muhu + Kihnu island sweaters + Estonian-handicraft. The heritage Müürivahe sells: Estonian wool-knit Muhu sweaters (the heritage Muhu island geometric-pattern wool-knit cardigans + sweaters $60-200); Estonian wool-knit Kihnu sweaters (the heritage Kihnu island UNESCO-recognized handicraft wool-knit, $80-300); Saaremaa juniper-wood crafts (the heritage Estonian island woodwork — kitchen utensils, jewelry, decorative pieces $20-100); the heritage Estonian linen-and-wool textiles (placemats, table runners, throws $30-150); the heritage Estonian woolen mittens + socks + hats ($15-60); the heritage amber jewelry (Baltic-amber from the Estonian + Latvian + Lithuanian coast). Open daily 10:00-18:00 May-September; reduced hours October-April. Pack: cash (euros, the recognized Estonian currency since 2011) + cotton tote bag + leather sneakers + Estonian-handicraft shopping list. Skip the heritage Müürivahe in heavy rain — the open-air market closes briefly during downpours; verify weather before visiting.
Yes — peak Tallinn sauna season. The recognized Tallinn sauna register: Iglupark (the heritage 2017 Iglu-shape sauna huts on Tallinn harbor at Kai 6 — €25-50 entry, book 1-2 days ahead, the recognized Tallinn design + sauna destination, with Baltic-sea swimming); Kalma Saun (the heritage 1928 Tallinn-Kalamaja public sauna at Vana-Kalamaja 9a, €15 entry no booking, the recognized old-school Tallinn public-sauna heritage); the heritage Bath House Tallinn (the recognized Tallinn Old Town spa-hotel sauna at the heritage Telegraaf Hotel — €40-80 spa session); the heritage Saun Kalda (the heritage Tallinn-Kalamaja Estonian-traditional sauna). Pack: swim, sauna towel (€5-10 rental at Iglupark), flip-flops, water bottle, change of clothes, the heritage post-sauna sausage + Estonian-craft-beer (Põhjala + the heritage Saku + A. Le Coq beer). Sauna etiquette: nude + shower before, swim between (Baltic Sea is 16-19°C / 61-66°F July, bracing-but-bearable), sausage + beer after.