天气

天气 (tiānqì) is "heaven's qi," the sky's current temperament, built from the same 气 that runs through TCM's vital energy, 生气 (getting angry, "generating qi"), and 空气 (kōngqì, air). Weather is the sky's mood, and the everyday openers treat it that way: 今天天气真好 ("today's weather is truly fine") and its glum twin 天气不好 are among the first fully natural sentences a learner can deploy, requiring no verb at all beyond the adjectives. Climate, by contrast, is 气候 (qìhòu), the same 候 as in 时候 (time), weather aggregated over seasons.

Temperature talk runs on two adjectives and one intensifier: 热 (rè, hot), 冷 (lěng, cold), and the nearly mandatory 很 (hěn), which in these sentences carries no real "very" and simply makes the sentence complete: 今天很热. The follow-ups are 热死了 ("hot to death," standard summer hyperbole) and the northern winter's 冻死了. Humid heat has its own word, 闷热 (mēnrè, "stuffy hot"), the Yangtze summer in two characters.

The weather verbs assign each phenomenon its own motion: rain and snow 下 (descend), wind 刮 (scrapes), thunder 打 (strikes), fog 起 (rises), the sun 出 (comes out). Learners who internalize the pairings stop translating "it is raining" and start saying what Chinese says: the rain is coming down. There is no dummy "it"; the weather noun is the subject or the object, and the sentence 下雨了 with its change-of-state 了 means the rain has started, which is the information anyone actually wants.

Orthographically the weather lives under one roof: the rain radical 雨 caps 雪 (snow), 雷 (thunder), 雾 (fog), 霜 (frost), 露 (dew), 虹 (rainbow's older writing 霓虹 survives in neon lights), and 霾 (haze). It is among the most visually satisfying radical families in the script, a cloud dropping droplets since its oracle-bone form. Umbrella vocabulary completes the survival kit: 伞 (sǎn) is the umbrella (the character is a picture of one), 打伞 is to hold one up, and 带伞 ("bring an umbrella") is what the forecast tells you to do.

天气预报 (tiānqì yùbào, "weather pre-report") has a fixed liturgy that makes it excellent listening practice: temperatures as 最高气温 and 最低气温 (highs and lows, in 度 dù, degrees), sky conditions as 晴 (qíng, clear), 多云 (duōyún, cloudy), 阴 (yīn, overcast, the same yin as in yin-yang, the shadowed half), and precipitation probabilities as 降水概率. Cardinal winds blow as 北风、南风 with strength in 级 (jí, force levels), and the typhoon, 台风 (táifēng), arrives with numbered force and an assigned name every summer along the southeast coast.

The 2010s added a new segment to the forecast: air quality. 雾霾 (wùmái, smog) pairs fog with the old haze character 霾, revived from near-obscurity when particulate pollution became urban daily reality, and the AQI (空气质量指数) and PM2.5 entered ordinary speech, the latter pronounced as English letters plus 二点五. The vocabulary spawned behavior words: 戴口罩 (wearing a mask, standard smog practice years before 2020), 空气净化器 (air purifier), and the aspirational 蓝天 (blue sky), whose count per year became a government performance metric. Beijing's air has improved markedly since the mid-2010s "airpocalypse" years, and the vocabulary is now used as much for gloating about good days as for enduring bad ones.

Wind and rain together mean hardship endured, and the pairing saturates the idiom stock: 风风雨雨 (the ups and downs of years), 经风雨见世面 ("weather the storm and see the world," Mao's phrase for toughening youth), 风雨同舟 ("same boat in wind and rain," solidarity in trouble), and 风雨无阻 ("neither wind nor rain shall stop it," the postal-service promise applied to any determined plan). Snow's best idiom is warmer: 雪中送炭 ("delivering charcoal in the snow") is help that arrives exactly when needed, the opposite of 锦上添花 ("adding flowers to brocade"), the redundant favor done for someone already flourishing.

The weather also times the culture's calendar sensibility. The 24 solar terms, covered in this guide's 节气 entry, are two-week weather predictions fossilized into the calendar (谷雨 "grain rain," 霜降 "frost's descent"), and the plum rains, 梅雨 (méiyǔ), name the mold-friendly weeks of early summer in the lower Yangtze when the plums ripen and nothing dries. To know the weather words is to hold one end of a very long thread that runs back through agriculture into the oldest layers of the language.