Forecasting Love and Weather

12 key cast members — leads, supporting, and notable appearances.

Park Min-young

Jin Ha-kyung

Song Kang

Lee Si-woo

Yoon Park

Han Ki-joon

Yura

Chae Yoo-jin

Lee Sung-wook

Eom Dong-han

Moon Tae-yu

Shin Seok-ho

Yoon Sa-bong

Oh Myung-joo

Chae Seo-eun

Kim Soo-jin

Kwon Hae-hyo

Ko Bong-chan

Kim Mi-kyeong

Bae Su-ja

Jung Woon-sun

Jin Tae-kyung

Jang So-yeon

Lee Hyang-rae

All 16 episodes — spoiler-light recaps with the key moments from each.

EP 01

Signal

Feb 12, 2022 · JTBC

Ha-kyung’s carefully arranged world — engagement, promotion, professional standing — comes apart in a single night. She catches her fiancé with a weather reporter. That reporter’s boyfriend, Si-woo, is simultaneously dumped by the same woman. The episode plays the double betrayal with precision: two strangers, one catastrophic night, a shared workplace neither of them can escape. The opening hailstorm that no one predicted is not subtle symbolism — but it works.

EP 02

Sensible Temperature

Feb 12, 2022 · JTBC

Two months later: Ha-kyung has been promoted to team head, Si-woo has transferred to KMA headquarters, and their exes are already married. The episode establishes the core awkwardness — four people, one office, an unbearable social triangle. Over drinks, Ha-kyung and Si-woo bond over the absurd coincidence that ties them. Park Min-young plays the armor with precision; Song Kang plays someone who doesn’t understand why she’s wearing it.

EP 03

In Between Seasons

Feb 19, 2022 · JTBC

They spend the night together after too many drinks — and agree, the morning after, to pretend it never happened. The KMA is under external pressure over a Wind Wave Warning Ha-kyung refuses to lift until the science is ready. Both storylines track the same emotional logic: Ha-kyung holds the line until data supports otherwise, in the office and everywhere else. Si-woo tells her plainly he won’t pursue her unless she wants it. That line lands.

EP 04

Visibility

Feb 19, 2022 · JTBC

Yoo-jin publishes a biased article criticizing the KMA’s fog advisory system following a highway pileup — turning a professional dispute into a personal one. Ha-kyung and Si-woo prepare a formal rebuttal together, and the shared project becomes the first real evidence of their professional chemistry. The drama is careful here: it earns the closeness before asking you to root for it.

EP 05

Localized Heavy Rain

Feb 26, 2022 · JTBC

Ki-joon starts unraveling — Yoo-jin lied to him about something significant, and he can’t let it go. Meanwhile, the workplace tensions in Ha-kyung’s team create a friction that bleeds into the personal. The episode does quiet work on the supporting cast: Dong-han’s domestic troubles add texture, and the office dynamic feels genuinely lived-in rather than merely convenient backdrop.

EP 06

Heat Island

Feb 26, 2022 · JTBC

Ha-kyung’s suspicion of Si-woo sharpens after a motel encounter she can’t explain — then her mother’s health scare pulls her attention entirely. Si-woo’s secretive personal life begins to surface around his estranged father, adding a layer beneath his easy exterior that the show has been earning slowly. The episode reminds you there are real histories at work here, not just chemistry.

EP 07

Ozone Warning

Mar 5, 2022 · JTBC

Ki-joon seeks outside perspective on his deteriorating marriage; Si-woo, now without housing, finds himself quietly helping someone else in need. Flashbacks to Si-woo’s difficult childhood arrive — they do the heavy lifting that the present-day story needed. Song Kang handles the quieter register well: the episode softens him without making him simple.

EP 08

Discomfort Index

Mar 5, 2022 · JTBC

The rivalry between Si-woo and Ki-joon erupts — and the personal history between the two men turns out to be older and more layered than the audience was told. Ha-kyung is caught in the middle of a situation she didn’t create. The episode has the series’ sharpest confrontation so far; it earns the tension because it waited eight episodes to use it.

EP 09

Dry Changma

Mar 12, 2022 · JTBC

Ha-kyung reflects on what uncertainty means to a forecaster — and to someone who has been burned. Ki-joon follows her and Si-woo on their day off, unable to let go. Then Yoo-jin tells Ha-kyung that Si-woo doesn’t believe in marriage — a revelation that stops her cold. Ha-kyung has never dated anyone who didn’t want a future. This is the episode that clarifies what the obstacle actually is.

EP 10

Tropical Night

Mar 12, 2022 · JTBC

Pressure from Ha-kyung’s mother to settle down; a nosy reporter sniffing around the KMA; incorrect heat data accidentally published on the public portal — there is a lot in motion here, and not all of it connects neatly. Yoo-jin packs her bags and leaves Ki-joon’s apartment. The drama signals it’s entering its final stretch by tightening the screws on every subplot simultaneously.

EP 11

1 Degree

Mar 19, 2022 · JTBC

Ha-kyung sends Si-woo to the Jeju Typhoon Center — putting distance between them precisely when they had started to close it. He leaves without a word. She is devastated, and chooses to blame old damage rather than look inward. Dong-han’s daughter suffers an allergic reaction at the office, triggering a fierce confrontation with his estranged wife. The episode is emotionally dense and the separation lands hard.

EP 12

Variation Area

Mar 19, 2022 · JTBC

Ha-kyung maintains her composure at work while quietly falling apart everywhere else. Yoo-jin and Ki-joon’s estrangement deepens. In Jeju, Si-woo begins confronting the unresolved issues with his father that have been hovering at the edges of his story since episode six. The episode paces its emotional beats carefully — the separation is not dramatized; it is shown accumulating.

EP 13

Scenario 1, 2, 3

Mar 26, 2022 · JTBC

Ha-kyung and Si-woo each rehearse their possible futures — how to reconcile, how to walk away, how to survive not choosing. Yoo-jin’s complicated family background arrives in the form of her mother and stepfather, adding new texture to a character who has been mostly antagonist until now. This episode is the cleanest character work of the back half: everyone is finally standing in front of something they’ve been avoiding.

EP 14

Anticyclone

Mar 26, 2022 · JTBC

Pressure eases. Ki-joon’s obsession with Ha-kyung’s relationship begins to quiet — he is finally seeing his own patterns clearly. A critical conversation between Ha-kyung and Si-woo opens the door again. The episode is the drama at its calmest — no crises, no explosions — and that restraint is exactly right. Equilibrium, before the finale tests it.

EP 15

Ensemble

Apr 3, 2022 · JTBC

In a piece of near-comedy, Ha-kyung and Si-woo’s office romance is blurted out in the cafeteria — at the exact moment they have already broken up. The timing is cruel and very well executed. Si-woo’s father situation reaches its pivot point. The drama manages its external pressures and the internal emotional state simultaneously without dropping either thread. One episode left, and the ground has been properly cleared.

EP 16

Tomorrow’s Answers

Apr 3, 2022 · JTBC

The finale. Ha-kyung and Si-woo reconcile — and this time, there is no condition attached. Si-woo has genuinely moved: he commits to a future, not as capitulation but as growth. Dong-han and his wife arrive at an honest reckoning; their daughter’s health scare becomes the catalyst for something cautiously hopeful. Ki-joon and Yoo-jin, the couple who started all of this, welcome a child — the drama grants them peace but not exoneration. Ha-kyung steps forward open, unguarded. The final image earns its quiet.

Full spoilers ahead — everything that happens in the finale and what it all means.

The impasse breaks — finally. Everything in the finale depends on one question the drama has been building toward since episode nine: can Si-woo genuinely change, or was his resistance to marriage a fixed point? The answer arrives not through a dramatic declaration but through action — Si-woo approaches Ha-kyung with the future she needs, not the one he was comfortable with. Park Min-young plays the moment of belief with careful restraint: she doesn’t melt, she simply stops holding the door shut.

The supporting cast lands its own resolutions. Dong-han’s storyline — his estranged wife, his daughter’s allergic reaction, years of accumulated distance — closes on a note that is cautiously hopeful rather than sentimentally resolved. The drama never promised anyone a clean ending, and it keeps that promise: the door between Dong-han and his wife is open again, not healed. That’s the correct choice. Meanwhile, Si-woo’s father, who has haunted the margins of his story since episode six, gets a scene that finally closes that wound rather than just gesturing at it.

Ki-joon and Yoo-jin are given a baby and not quite forgiven. This is the finale’s most interesting moral decision. The couple who triggered the whole drama — whose infidelity in episode one set everything in motion — ends the series with a child and a version of domestic peace. The drama doesn’t punish them harshly, but it frames their happiness without warmth. They have what they wanted. The show simply doesn’t celebrate it with them. It’s a position on moral consequence that refuses easy catharsis without becoming bitter about it.

The final image says what the drama has been saying all along. Ha-kyung, who spent sixteen episodes treating uncertainty as threat, stands with Si-woo watching a clearing sky. The weather metaphor closes as it opened — but reversed. Episode one gave us the storm no one predicted. The finale gives us the clear sky no one was sure would come. Ha-kyung isn’t a different person; she has simply decided that the risk is worth it. The drama earns the moment because it earned her, slowly, across every scene in between.